# Lab-vs-Wild Defeater for Origin-of-Life Demonstrations ## Intro A common objection in conversations about God and the origin of life goes like this: "Scientists have already shown life can arise naturally. Miller and Urey made amino acids from simple gases in 1953. John Sutherland's team made RNA building blocks under early-earth conditions. Jack Szostak built protocells that grow and divide. Give it time and they will make life in a test tube." These experiments are real, and some of them are brilliant. Each one taught us something true about chemistry. But there is a question to ask about every one of them: who did the choosing? Someone picked the starting chemicals, bought or purified them, added them in a planned order, set the temperature, removed what would have ruined the result, and stopped the reaction at the right time. On the early earth, nobody was there to do any of that. So the experiments show what intelligent chemists can do with chemistry. That is a different thing from showing what chemistry does by itself in the wild. The more skill an experiment needs to work, the more it looks like a model of design, not a replacement for it. Quick reply: *"I'm impressed by those experiments too. But in every one of them a chemist chose the ingredients, the order and the conditions. The early earth had no chemist. Show me the same result without the scientist's hand on the process."* ## Cheatsheet **The 30-second reply:** The famous origin-of-life experiments are real science, and you should say so. Miller showed that energy passed through simple gases makes amino acids. Sutherland's team found a clever route to two of the four RNA letters. Szostak's lab showed that fatty-acid bubbles can grow, divide and let building blocks in. But look at the method. The reagents were pure, the steps were staged, unwanted byproducts were kept out or taken out, and the conditions were picked because they work. That is what chemists are trained to do, and it is exactly what an unguided early earth could not do. The experiments measure the chemist's skill. They do not show that a messy, unsupervised planet would get the same result. **The 5 fast facts:** 1. **Miller 1953 used a chosen atmosphere.** Methane, ammonia, hydrogen and water vapor, a strongly reducing mix favored by the planetary models of the day. Most geochemists now think the early atmosphere was weakly reducing at best (Kasting, *Science* 1993). 2. **Sutherland 2009 used purified feedstocks in sequence.** Cyanamide, cyanoacetylene, glycolaldehyde, glyceraldehyde and phosphate made two pyrimidine ribonucleotides by a route that bypasses free ribose (Powner, Gerland and Sutherland, *Nature* 2009). Robert Shapiro said its pure cyanoacetylene "could be considered a fantasy" on the early earth (Nicholas Wade, *New York Times*, May 2009). 3. **Szostak's protocells divided through a filter.** The 2003 vesicles grew by taking in added fatty acid and divided by being forced through small pores (Hanczyc, Fujikawa and Szostak, *Science* 2003). 4. **Self-replicating RNA enzymes were evolved in the lab.** Lincoln and Joyce's cross-replicating ribozymes came out of test-tube evolution and were fed ready-made RNA pieces (*Science* 2009). 5. **The chemist is the variable that never gets controlled for.** Meyer's test: a result is relevant only if it arose "without intelligent agents programming the system with equivalent amounts of functionally specified information" (*Darwin's Doubt*, PDF p. 337). **The 3 strongest counter-moves:** - *"Who chose the reagents, and where did they come from in nature?"* Ask for the unguided source of each pure starting material. - *"What was removed, and when?"* Ask what interfering byproducts the procedure kept out, filtered off or destroyed. - *"What happens if you mix everything at once?"* Ask whether the route still works when every feedstock is present together, in natural ratios, with no staging. **Concessions to make freely (do not over-claim):** - Yes, these are serious experiments by accomplished scientists in leading journals. - Yes, Miller showed that organic building blocks form readily from simple gases plus energy. Reanalysis of his old samples found more amino acids than he first reported (Johnson and colleagues, *Science* 2008). - Yes, the early-atmosphere objection to Miller is weaker than it is sometimes made to sound. Neutral gas mixtures give more amino acids than older work suggested when oxidation inhibitors are added before analysis (Cleaves and colleagues, 2008). - Yes, Sutherland's 2009 route solved a problem that had resisted researchers for years, and Szostak's protocell work taught real lessons about membranes. - Yes, laboratories have to simplify. Not every controlled step is illegitimate. **What NOT to defend:** - Do not call the researchers frauds or say the experiments were faked. The dispute is about interpretation. - Do not claim the Miller experiment produced nothing under any realistic atmosphere. That overstates the case. - Do not say "no lab will ever make anything life-like." Predicting failure is a hostage to fortune and is not needed. - Do not lean on one quotation from James Tour as if it settled the matter. Use his point, not his authority. **The closing line:** "Every one of these experiments has a chemist standing behind it. That is not a flaw in the science. It is the most important result: the closer we get to life, the more intelligence the process needs." ## In full Defeater for the objection: *"Laboratory demonstrations from the Miller experiment (1953) to Sutherland's ribonucleotide synthesis (Powner, Gerland and Sutherland, Nature 2009), Szostak's model protocells and self-replicating ribozymes show that the steps from simple chemistry toward life occur naturally. Therefore life can arise from non-life without a designer, and the remaining gaps will close with time."* The objection is common in classrooms, popular science writing and online debate. It is persuasive because it points to real, peer-reviewed results by respected scientists, and because each headline sounds like a step on a staircase that ends in a cell. The defeat structure is **four-pronged**: (1) **Fair statement of the achievements**: each experiment demonstrates something true, and the defeater grants it. (2) **Investigator interference**: the results depend on choices undirected nature does not make, namely purified reagents, controlled sequencing of steps, removal or exclusion of interfering byproducts, and conditions chosen because they work; the experiments are therefore demonstrations of what intelligent chemists can do, which is the lab-versus-wild gap. (3) **The early-atmosphere question for Miller**: the 1953 mixture reflected a strongly reducing model most geochemists no longer hold, and the honest state of the debate (including the 2008 reassessment of neutral atmospheres) is that the yield problem shifts but the investigator's role does not go away. (4) **Building blocks are not systems**: even granting every synthesis, none crosses from components to a coded, self-replicating, self-sustaining system, so the staircase has no top step yet. The phrase "investigator interference" comes from Thaxton, Bradley and Olsen's *The Mystery of Life's Origin* (1984), which gave a chapter, "Plausibility and Investigator Interference," to the ways experimenters select purified reactants, isolate them from competing chemicals and protect their products. James Tour, a synthetic chemist at Rice University, has pressed the same point from the bench in a series of essays in *Inference*. **Honest limits.** This defeater does not prove that no unguided route exists. It shows that the experiments offered as evidence for one do not show it, because the decisive variable, the investigator, was never removed. If a future experiment reaches a self-replicating, information-bearing system from a realistic, unsorted mixture with no staged intervention, the argument would have to be revised. That has not happened. ## Argument structure | | Premise | Notes | |---|---|---| | **P1** | **The famous demonstrations are real chemistry.** Miller made amino acids from gases and sparks; Powner, Gerland and Sutherland made activated pyrimidine ribonucleotides by a route that bypasses free ribose; Szostak's group made fatty-acid vesicles that grow, divide and admit nucleotides; Lincoln and Joyce made RNA enzymes that amplify each other. | Fair concession | | **P2** | **Each result depends on investigator choices.** Pure reagents, staged additions, exclusion or removal of interfering byproducts, chosen concentrations and temperatures, and stopping points set by the experimenter. | Investigator interference (Thaxton, Bradley and Olsen; Tour) | | **P3** | **Undirected early-earth chemistry does not make those choices.** No unguided process purifies a single feedstock, holds it back until step four, removes the side products that would ruin step five, and stops at the useful intermediate. | The lab-versus-wild gap | | **P4** | **So the experiments show what intelligence can do with chemistry, not what chemistry does alone.** A result that requires a chemist's information as input is evidence of the power of design, by Meyer's test (*Darwin's Doubt*, PDF p. 337). | Reductio on laboratory success | | **P5** | **Even on their own terms, the results are components, not a living system.** No experiment has produced a coded, self-replicating, metabolizing system from an unsorted prebiotic mixture. | See [Minimal Cell](/codex/minimal-cell/), [RNA World Failure Argument](/codex/rna-world-failure-argument/) | | **C** | **The demonstrations do not show that life arises naturally.** They show that skilled chemists can make some of life's parts under controlled conditions. The origin of life remains unexplained by unguided chemistry, and the experiments themselves model an intelligent cause. | | ## Master objections to the whole argument **MO1: "Every experiment is controlled. By your logic no lab result could ever tell us about nature."** - Controls are fine when they stand in for something nature plausibly does. A lab can heat a flask because the early earth had heat. The problem is a step with no natural counterpart: a single pure feedstock where nature would give a mixture, a reagent held back and added later, a side product filtered off. When success depends on those steps, the lab is supplying something the wild did not. That is the specific gap this defeater names. See [Methodological Naturalism Critique](/codex/methodological-naturalism-critique/). **MO2: "Researchers know this. They work hard to make conditions prebiotically plausible."** - Many do, and the best work states its assumptions openly. Sutherland's group argues that its starting materials are plausible feedstocks and that its conditions fit early-earth models. But "plausible" usually means each step can be defended one at a time. The pathway as a whole, run together, in the wild, without a chemist sequencing it, is the thing that has not been shown. Tour's complaint is precisely about this bookkeeping: "One group publishes their results reporting products in low yields and unusable gross mixtures. Another group then uses those products, in their pure and abundant form, as *their* starting materials" (James Tour, "Two Experiments in Abiogenesis," *Inference* 2, no. 3, 2016). **MO3: "Give it time. Seventy years is short. The gaps are closing."** - Real progress on components is granted. But the gap this defeater names does not shrink as the syntheses get better, because better syntheses usually need more control, not less. A promissory note is not evidence, and the honest present tense is that no unguided route to a living system has been demonstrated. See [God of the Gaps Objection Defeater](/codex/god-of-the-gaps-objection-defeater/) for why the design inference rests on what is known about causes. **MO4: "Even if a chemist designed the experiment, the chemistry itself happened by natural law."** - Agreed, and that is the point. Natural law operating on materials arranged by a mind is exactly what design looks like in practice. A car engine runs by natural law too. The question is not whether law operates, but whether law operating on unsorted materials, with no one arranging them, produces the result. The experiments do not test that. --- ## Premise 1, The achievements stated fairly ### Affirmative case 1. **Miller 1953.** Stanley Miller passed electric discharges through methane, ammonia, hydrogen and water vapor in a closed glass apparatus and reported amino acids and other organic compounds (Stanley L. Miller, "A Production of Amino Acids Under Possible Primitive Earth Conditions," *Science* 117, 1953, 528-529). It founded experimental prebiotic chemistry. A reanalysis of Miller's archived samples from a related volcanic-style apparatus identified 22 amino acids and five amines (Adam P. Johnson and colleagues, "The Miller Volcanic Spark Discharge Experiment," *Science* 322, 2008, 404). See [Miller-Urey Experiment](/codex/miller-urey-experiment/) and [Stanley Miller](/codex/stanley-miller/). 2. **Powner, Gerland and Sutherland 2009.** Earlier attempts to make RNA nucleotides by joining ribose to a base failed for the canonical pyrimidines. This team found a route through arabinose amino-oxazoline and anhydronucleoside intermediates that bypasses free ribose and free bases entirely, starting from cyanamide, cyanoacetylene, glycolaldehyde, glyceraldehyde and inorganic phosphate ("Synthesis of activated pyrimidine ribonucleotides in prebiotically plausible conditions," *Nature* 459, 2009, 239-242). Gerald Joyce called the chemistry robust; Jack Szostak called it one of the great advances in prebiotic chemistry. 3. **Szostak's protocells.** Hanczyc, Fujikawa and Szostak showed that fatty-acid vesicles grow by taking up fatty acid supplied as micelles and divide without losing their contents when extruded through small pores, so they can cycle through growth and division ("Experimental Models of Primitive Cellular Compartments: Encapsulation, Growth, and Division," *Science* 302, 2003, 618-622). Mansy and colleagues then showed that activated nucleotides added outside such vesicles cross the membrane and take part in template copying inside, while longer polymers stay in ("Template-directed synthesis of a genetic polymer in a model protocell," *Nature* 454, 2008, 122-125). 4. **Lincoln and Joyce 2009.** Two RNA enzymes catalyze each other's synthesis by joining component pieces, so the pair amplifies exponentially without proteins ("Self-Sustained Replication of an RNA Enzyme," *Science* 323, 2009, 1229-1232). ### Anticipated objections 1. *"If you grant all that, you've granted that life's chemistry is natural."* ### Rebuttals 1. **Granting the chemistry is not granting the history.** Every reaction in a living cell is natural chemistry too. The question is whether undirected processes assembled the right chemistry in the right order without guidance. The achievements answer a different question: can these reactions occur at all? Failure-mode: confusing "possible under some conditions" with "happened without anyone setting the conditions." --- ## Premise 2, Investigator interference ### Affirmative case 1. **Purified reagents.** Natural settings give mixtures. Laboratory syntheses start from bottled, purified chemicals. Tour, writing from his own synthetic work: "Purification is essential" (James Tour, "Animadversions of a Synthetic Chemist," *Inference* 2, no. 2, 2016). In the 2009 ribonucleotide route each feedstock is supplied as a clean reagent. 2. **Controlled sequencing.** Sutherland's route works by bringing the starting materials together in a particular order so that the right intermediates form. Press coverage at the time described the key insight as combining the starting chemicals in a different order from earlier attempts (Nicholas Wade, "Chemist Shows How RNA Can Be the Starting Point for Life," *New York Times*, May 2009). An order chosen by a chemist is information supplied by a chemist. 3. **Removal and exclusion of interfering byproducts.** Miller's apparatus collected products in a flask away from the discharge, so they were not broken down by the sparks that made them. Szostak's vesicles divided by being pushed through a filter of fixed pore size. Lincoln and Joyce's ribozymes ran on supplied component pieces with nothing else competing for them. 4. **Conditions chosen to work.** Concentrations, pH, temperature and timing are tuned until the reaction succeeds. That is good laboratory practice. It is also the opposite of what an unsupervised environment does, which is to run every reaction at once. 5. **Chemists supplying the parts.** The Lincoln and Joyce enzymes were obtained by test-tube evolution from a laboratory-made population, and the press release noted that the component pieces "are relatively complex and not something that would have been found floating in the primordial ooze" (ScienceDaily, January 2009, reporting Scripps Research). Mansy and colleagues supplied chemically activated nucleotides from outside the vesicle. 6. **A mainstream chemist's verdict.** Robert Shapiro of New York University, no design advocate, said Sutherland's recipe "definitely does not meet my criteria for a plausible pathway to the RNA world," and that the appearance of cyanoacetylene in pure form on the early earth "could be considered a fantasy" (quoted by Nicholas Wade, *New York Times*, May 2009). Sutherland replied that cyanoacetylene is consumed fastest in his reaction and has been detected on Titan, so it could have been present. ### Anticipated objections 1. *"Shapiro had his own rival theory. Of course he criticized RNA-first chemistry."* 2. *"Sutherland's group answered the cyanoacetylene objection."* ### Rebuttals 1. **Motive does not change the chemistry.** Shapiro favored metabolism-first scenarios, but his complaint applies to them too: whoever controls the conditions supplies the success. The defeater uses his point, not his alternative. 2. **Presence is not purity or timing.** Showing that cyanoacetylene could have existed is different from showing it was present in usable concentration, separated from what destroys it, and delivered at the right step. Failure-mode: answering an availability objection when the challenge was about control. --- ## Premise 3, The lab-versus-wild gap ### Affirmative case 1. **Nature does not stage reactions.** A pond, vent or tidal pool receives everything at once, in whatever ratios geology provides. The interference steps in Premise 2 have no natural counterpart. 2. **Side reactions win by default.** Reactive feedstocks react with many partners. Without someone to exclude them, the useful products compete with a large number of useless ones. Tour describes the outcome in published work as "low yields and unusable gross mixtures" which later papers then replace with pure, abundant starting materials ("Two Experiments in Abiogenesis," *Inference* 2, no. 3, 2016). 3. **The cumulative problem.** Each step that needs intervention multiplies the improbability of the whole route running unattended. A pathway of a dozen staged steps is not a dozen small hurdles; it is one large one. 4. **Meyer's test.** In discussing computer simulations of self-organization, Meyer says an outcome would be biologically relevant only "if such a functional sequence of letters arose without intelligent agents programming the system with equivalent amounts of functionally specified information" (*Darwin's Doubt*, PDF p. 337). Laboratory chemistry is subject to the same test. ### Anticipated objections 1. *"Natural settings can sort chemicals: wet-dry cycles, mineral surfaces, temperature gradients."* ### Rebuttals 1. **Then show the sorting doing the work.** Natural sorting mechanisms are worth studying, and some are real. The defeater asks that the experiment use them in place of the chemist, end to end. Proposing that something in nature might do what the chemist did is a hypothesis, not a demonstration. Failure-mode: substituting a possible natural mechanism for an actual result. --- ## Premise 4, The early-atmosphere question for Miller ### Affirmative case 1. **The 1953 mixture.** Miller used a strongly reducing mixture because the planetary models of the time, including Harold Urey's, favored one. Reducing gases make organic synthesis much easier. 2. **The revised atmosphere.** Later geochemistry moved toward an early atmosphere dominated by carbon dioxide and nitrogen with little free oxygen (James F. Kasting, "Earth's Early Atmosphere," *Science* 259, 1993, 920-926). In such mixtures spark experiments were long reported to give very low amino-acid yields. See [Miller-Urey Reframe Argument](/codex/miller-urey-reframe-argument/) for the full case. 3. **The fair update.** Cleaves, Chalmers, Lazcano, Miller and Bada reported that neutral gas mixtures give significant amounts of amino acids once oxidation inhibitors such as ferrous iron are added before hydrolysis, and that earlier low yields reflected oxidation during workup ("A Reassessment of Prebiotic Organic Synthesis in Neutral Planetary Atmospheres," *Origins of Life and Evolution of Biospheres* 38, 2008, 105-115). Johnson and colleagues argued that volcanic eruption clouds could supply locally reducing conditions. 4. **What the update does and does not change.** It weakens the claim that Miller chemistry fails outright in a realistic atmosphere. It does not remove the investigator: the 2008 result itself depends on adding a chemical at the analysis step. And the products are still simple, racemic building blocks. See [Chirality Argument](/codex/chirality-argument/). ### Anticipated objections 1. *"So the atmosphere objection is dead. Creationists should stop using it."* ### Rebuttals 1. **Use it carefully, not loudly.** The atmosphere question is genuinely debated, and the codex's position is that it should be stated with the 2008 reassessment in view. The stronger point never depended on it: amino acids are a long way from a cell, and Miller's own apparatus was designed to protect its products. Failure-mode: building the whole reply on the most contested premise. --- ## Premise 5, Components are not systems ### Affirmative case 1. **The parts list grows; the system does not appear.** Amino acids, some nucleotides, lipid vesicles and engineered ribozymes have each been made under some conditions. No experiment joins them into a self-sustaining, self-replicating system with a genetic code from an unsorted mixture. 2. **What a minimal system needs.** A genome, a way to read it, catalysts it specifies, an energy supply and a membrane, working together. See [Minimal Cell](/codex/minimal-cell/). 3. **The RNA-first bridge is still missing.** No ribozyme has been shown to copy itself end to end from a realistic soup of single nucleotides. See [RNA World Failure Argument](/codex/rna-world-failure-argument/). 4. **Shapiro's picture.** A mixture of simple chemicals, "even one enriched with a few amino acids, no more resembles a bacterium than a small pile of real and nonsense words, each written on an individual scrap of paper, resembles the complete works of Shakespeare" (Robert Shapiro, as quoted in Kenneth Boa and Robert Bowman, *20 Compelling Evidences That God Exists*, PDF p. 41). ### Anticipated objections 1. *"You keep moving the goalposts. Every success gets dismissed as 'just components.'"* ### Rebuttals 1. **The goalpost was set by the objection.** The objector claimed the experiments show life can arise naturally. Life is the goal. Granting each component synthesis as genuine progress while noting it is not life is accuracy, not goalpost-moving. Failure-mode: treating a parts inventory as an assembled machine. --- ## Christian satisfaction, why the framework is internally coherent - Christianity teaches that the world is ordered and searchable, so laboratory chemistry is a legitimate way to learn about it: "It is the glory of God to conceal a thing; But the glory of kings is to search out a matter" ([Proverbs 25:2](/codex/proverbs-25-2/), ASV). - It teaches that life came from the ground by an act of God, which means the chemistry of the ground matters: "Jehovah God formed man of the dust of the ground, and breathed into his nostrils the breath of life" ([Genesis 2:7](/codex/genesis-2-7/), ASV). - So a Christian can celebrate every successful synthesis and still note what the experiments themselves display: chemistry arranged by a mind does things chemistry left alone has not been shown to do. ## Live-cite kit **Scripture:** - [Romans 1:20](/codex/romans-1-20/), "For the invisible things of him since the creation of the world are clearly seen, being perceived through the things that are made, even his everlasting power and divinity; that they may be without excuse" (ASV) - [Genesis 2:7](/codex/genesis-2-7/), "And Jehovah God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul." (ASV) - [Proverbs 25:2](/codex/proverbs-25-2/), "It is the glory of God to conceal a thing; But the glory of kings is to search out a matter." (ASV) - [Psalm 104:24](/codex/psalms-104-24/), "O Jehovah, how manifold are thy works! In wisdom hast thou made them all: The earth is full of thy riches." (ASV) **Scholarly:** - Stanley L. Miller, *Science* 117 (1953), 528-529; Adam P. Johnson and colleagues, *Science* 322 (2008), 404. - Matthew W. Powner, Béatrice Gerland and John D. Sutherland, *Nature* 459 (2009), 239-242. - Martin M. Hanczyc, Shelly M. Fujikawa and Jack W. Szostak, *Science* 302 (2003), 618-622; Sheref S. Mansy and colleagues, *Nature* 454 (2008), 122-125. - Tracey A. Lincoln and Gerald F. Joyce, *Science* 323 (2009), 1229-1232. - James F. Kasting, *Science* 259 (1993), 920-926; H. James Cleaves and colleagues, *Origins of Life and Evolution of Biospheres* 38 (2008), 105-115. - James Tour, "Animadversions of a Synthetic Chemist," *Inference* 2, no. 2 (2016); "Two Experiments in Abiogenesis," *Inference* 2, no. 3 (2016). - [Stephen Meyer](/codex/stephen-meyer/), *Darwin's Doubt* (HarperOne 2013), PDF p. 337 (the programming test), p. 383 (causal adequacy). **Aphorism:** "The flask had a chemist. The early earth did not." ## Tactical notes 1. **Praise the experiment before you question it.** Name what it achieved. It disarms the anti-science charge and makes the investigator point land as a fair observation. 2. **Ask procedural questions, not rhetorical ones.** "Where did the pure cyanoacetylene come from?" "What happens if all five feedstocks go in together?" Specific questions beat general skepticism. 3. **Do not fight on the atmosphere alone.** Mention it with the 2008 reassessment in view, then move to investigator interference, which does not depend on it. 4. **Keep the target narrow.** The claim under attack is "these experiments show life arises naturally," not "prebiotic chemistry is worthless." 5. **Turn the success around.** Close by noting that the more an experiment succeeds, the more it shows what intelligence can do with matter. 6. **Know the companion pages.** For Miller detail use [Miller-Urey Reframe Argument](/codex/miller-urey-reframe-argument/); for Cronin and the chemputer use [Assembly Theory Objection Defeater](/codex/assembly-theory-objection-defeater/); for RNA-first claims use [RNA World Failure Argument](/codex/rna-world-failure-argument/). ## Connection to Scripture - [Romans 1:20](/codex/romans-1-20/), creation displays its Maker through what is made. - [Genesis 2:7](/codex/genesis-2-7/), life from the dust, by God's forming hand and breath. - [Proverbs 25:2](/codex/proverbs-25-2/), searching out creation is a royal calling, not a threat to faith. - [John 1:3](/codex/john-1-3/), nothing that was made came to be apart from the Word. - [Acts 17:24-25](/codex/acts-17-24-25/), God "giveth to all life, and breath, and all things" (ASV). ## Patristic / scholarly note - The investigator-interference critique was set out by Thaxton, Bradley and Olsen in *The Mystery of Life's Origin* (1984). [Stephen Meyer](/codex/stephen-meyer/) describes meeting Thaxton in 1985 and becoming intrigued by his argument that chemistry and physics alone cannot produce the information in DNA (*Darwin's Doubt*, PDF pp. 376-377). - Robert Shapiro, a mainstream chemist and no friend of design, made the same kind of criticism of RNA-first syntheses. - James Tour has argued the point from the perspective of a working synthetic chemist, most fully in his *Inference* essays. His public exchanges with [Lee Cronin](/codex/lee-cronin/) cover similar ground. ## See also - [Argument from Origin of Life](/codex/argument-from-origin-of-life/), the positive design case this defeater protects - [Miller-Urey Reframe Argument](/codex/miller-urey-reframe-argument/), the full treatment of the 1953 experiment - [Miller-Urey Experiment](/codex/miller-urey-experiment/), the concept page on the experiment and its history - [RNA World Failure Argument](/codex/rna-world-failure-argument/), why the RNA-first scenario falls short - [Chirality Argument](/codex/chirality-argument/), the handedness problem every synthesis leaves open - [Minimal Cell](/codex/minimal-cell/), what the first self-sustaining cell would need all at once - [Assembly Theory Objection Defeater](/codex/assembly-theory-objection-defeater/), the companion defeater on Cronin's measure and the chemputer - [Lee Cronin](/codex/lee-cronin/), origin-of-life chemist and Tour's frequent interlocutor - [Stephen Meyer](/codex/stephen-meyer/), design theorist whose causal-adequacy test frames the argument - [Abiogenesis](/codex/abiogenesis/), parent concept - [Hard Questions for Abiogenic Life](/codex/hard-questions-for-abiogenic-life/), field questions for any unguided account - [Methodological Naturalism Critique](/codex/methodological-naturalism-critique/), why the rules of the game do not settle the question ## Common questions this page answers **Q: Did the Miller-Urey experiment prove life can come from non-life?** No. It showed that electric sparks passed through simple gases produce amino acids, which are building blocks of proteins. That is real and important chemistry, but amino acids are not life, the gas mixture was chosen to favor the result, and the apparatus was built to protect its products. **Q: Have scientists created life in a lab?** No. Laboratories have made some of life's components, such as amino acids, some RNA nucleotides, fatty-acid bubbles and engineered RNA enzymes, under controlled conditions. No experiment has produced a self-replicating, metabolizing system with a genetic code from an unsorted mixture of simple chemicals. **Q: What is investigator interference in origin-of-life research?** It is the role the scientist plays in making an experiment succeed: choosing pure reagents, adding them in a planned order, removing or excluding byproducts that would spoil the reaction, and tuning the conditions. Because undirected nature does not make those choices, results that depend on them show what a chemist can do rather than what early-earth chemistry would do by itself. **Q: What did John Sutherland's 2009 experiment show?** Matthew Powner, Béatrice Gerland and John Sutherland found a route to two of the four RNA nucleotides that avoids the problem of joining ribose to a base, starting from simple feedstock chemicals. It was a major advance. Critics such as Robert Shapiro argued that the pure starting materials and controlled sequence of steps are unlikely on the early earth. **Q: Was the early earth's atmosphere different from what Miller used?** Most geochemists now think the early atmosphere was dominated by carbon dioxide and nitrogen rather than the methane-and-ammonia mixture Miller used. A 2008 reassessment found that neutral mixtures still give significant amino acids when oxidation is prevented during analysis, so the atmosphere objection should be used with care. **Q: Aren't all experiments controlled? Why is this a problem only for origin-of-life research?** Controls are fine when they stand in for something nature plausibly does. The problem arises when the result depends on steps that have no natural counterpart, such as a single purified reagent added at just the right moment. The question in origin-of-life research is precisely what happens without anyone arranging the steps. **Q: Should Christians be against origin-of-life research?** No. Searching out how creation works is a good and honorable task. The disagreement is only with the claim that experiments run by skilled chemists show that life arose without any intelligence behind it.