Race Nature Nurture

The plate says blank-slate and hereditarian accounts share a group-gap premise and differ on whether the gap is environment or genetics.

Two columns from one shared-gap box. The left says the blank is moral and gaps are design. The right says the gap is also genetic and policy must absorb it.

SteelMan: The two camps do share the observation of group averages and split on the cause.

Cut: The plate writes the verdicts. It does not show a measured gap.

The plate says the blank-slate claim is zero innate group difference, so every measured gap is racism or design, and a genetic hypothesis is labeled pseudo-science.

A balance at zero, a contract stamped blank slate, and a hypothesis sent to a forbidden drawer.

SteelMan: Equal moral worth is not the same claim as equal group means, and the plate separates those.

Cut: Zero innate is the contract's word. The plate does not test a gap.

The plate says the standardized Black-White cognitive gap is about one standard deviation, 10 to 15 IQ points, and has not closed on schedule.

A bell curve with a one-standard-deviation bracket and three citations: NAEP and military testing, Gottfredson, and Rushton and Jensen 2005.

SteelMan: A Black-White mean gap on common cognitive tests is a repeatedly measured finding.

Cut: About one standard deviation and has not closed are the plate's marks. The three citations were not opened.

The plate says individual overlap, group averages, and whether a rule may use the group average are three different claims.

Three layers: overlap, a mean gap, and a rule against group averages.

SteelMan: Those three claims do come apart.

Cut: The plate states the split. It does not show an overlap coefficient.

The plate says moving from equal worth to equal outcomes treats a moral axiom as an empirical result.

A scale of equal worth beside a results ledger with a gap.

SteelMan: Worth and outcome are different kinds of claim.

Cut: Category error is the title. The plate does not show that anyone equated the two in a statute.

The plate says height, literacy, and nutrition moved across generations while the rank order of group IQ gaps did not.

Three rising lines and one flat rank-order line, with Flynn and Dickens named.

SteelMan: Flynn gains and nutrition gains are real, and between-group rank order has been more stable than those levels.

Cut: Rank order did not is the plate's line. Flynn and Dickens were not opened.

The plate says both sides grant a gap and a within-group genetic share, and split on whether the between-group residual is zero or not proven zero.

A balance labeled both sides and a forked path.

SteelMan: That is a fair statement of the narrow technical dispute.

Cut: Both sides is the plate. It does not survey the field.

The plate says a common bar produces disparate pass rates, and disparate-impact or equity rules then move the bar by group.

One bar with different pass rates, then separate group bars under an equity rule.

SteelMan: A common cutoff on a tested distribution will pass groups at different rates if means differ.

Cut: The pass rates are unlabeled. The plate does not show a statute.

The plate says a gap plus a single rule produces unequal results, and color-conscious rules are the patch.

A courthouse, one rule, unequal piles, and a group-quota machine.

SteelMan: The logic follows if the inputs differ and the rule does not.

Cut: The piles have no counts. Quota is the machine's label.

The plate says the Black-White gap remains among affluent and college-educated families and is larger at the right tail.

Two household panels and a right-tail callout, citing NAEP and adoption studies.

SteelMan: A gap that survives parental education is evidence against a simple poverty account.

Cut: Remains and larger at the tail are the plate's words. NAEP and the adoption studies were not opened.

The plate says genes set a range and environment moves the outcome inside it, and that a ceiling differs from a floor.

A gene card, a reaction-range bracket, and a school moving a score inside the bracket.

SteelMan: Reaction range is a real quantitative-genetics idea.

Cut: The bracket has no units. The plate does not show a group ceiling.

The plate says environment-only and genes-plus-environment can draw the same score line, so the curve alone does not identify the cause.

One observed line and two causal cards.

SteelMan: A single trend line is under-identified.

Cut: The plate does not show a test that would separate the two cards.

The plate says the Minnesota Transracial Adoption Study found Black adoptees in White homes scoring below White adoptees, and treats that as a natural experiment.

Two houses and a score gap, with Minnesota named.

SteelMan: The study is the standard citation for this design, and adoptees are not a random draw of either population.

Cut: Below is the plate's word. The study was not opened, and selective placement is not on the plate.

The plate says a one-standard-deviation mean gap implies large right-tail ratios, and that those ratios track high-skill occupational gaps.

Two overlapping bells and a tail-ratio box.

SteelMan: Tail ratios grow quickly when means differ and variances are similar.

Cut: The ratio is not printed. Occupational gaps are asserted, not shown.

The plate says the establishment answers with equal worth, racism, and access, and does not answer the within-income, adoption, or polygenic evidence.

Three answered cards and three unanswered cards.

SteelMan: Those are different questions, and a moral answer does not close a measurement question.

Cut: Does not answer is the plate's charge. It does not survey the replies.

The plate says offspring regress toward the group mean, so high-IQ Black parents have children closer to the Black mean than equally high White parents to the White mean.

Two parent-to-child arrows and a Jensen citation.

SteelMan: Regression to the population mean is the statistical expectation if the group mean is the relevant mean.

Cut: The arrows have no points. Jensen was not opened. The plate assumes the group mean is the genetic mean.

The plate says educational-attainment polygenic scores differ by ancestry and predict the same gap found on tests.

A scorecard, a gap, and an environmental-confound card, citing Lee et al. 2018 and Duncan 2019.

SteelMan: Polygenic scores built in European samples predict less well across ancestries, and mean differences are reported.

Cut: Predict the same gap is the plate. Lee and Duncan were not opened. The confound card is drawn and not answered.

The plate says genes are a range, methylation and stimulation move the result inside it, and poverty can suppress a score without rewriting the gene.

A gene card, two switches, and a bracket around a score.

SteelMan: Development sits between genotype and a test score.

Cut: The switches have no measured effect. Suppress is the caption.

The plate says the rule is that a genetic hypothesis may be explored for height, disease, and ancestry but not for cognition, crime, or behavior.

An open door and a locked door.

SteelMan: The publication and funding constraints on behavioral group hypotheses are real.

Cut: May not is the plate's rule. It does not show a statute or a journal policy.

The plate says denying a gap and denying individual overlap are both errors, and the third claim is the within-group genetic share.

Three columns, the third labeled Gottfredson, Plomin, and Turkheimer, with a 50 to 80 percent range.

SteelMan: A mean gap and a large overlap can both be true, and within-group heritability of IQ is high in adults.

Cut: The 50 to 80 range is the plate's mark. The three names were not opened. Within-group heritability does not settle the between-group gap.

The plate says the argument is five splits: moral worth against empirical outcome, individual against group, within-group heritability against between-group cause, a movable level against a stable rank, and one rule against an equity patch.

Five numbered fault lines.

SteelMan: Those are the series' distinctions, and the plate keeps them separate.

Cut: The plate restates the series. It does not test any of the five.