All 48 in-text bold spans converted: term first-introductions to italics
(model merging, genetic drift, continual learning, Fisher-Muller effect,
outbreeding depression, directed sex, grounded inheritance/evaluation,
and kin), pure-emphasis spans to plain text (the organising-claim
sentence, the emergent-null statements, the supported-conclusion
sentence). Bold retained only where PNAS uses it: run-in paragraph
headings (Design rules. / Analytic tier. / etc.), table labels, and
reference volume numbers. Repeat mentions of first-use-italicised terms
de-italicised (italics at first use only). 18-pp rebuild clean.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BkRLcc18rwT2Lysu6PbG7v