Restructure: descriptive tier and experiment names, paper/manuscript

- paper/pnas -> paper/manuscript (venue-neutral)
- configs/layer1 -> configs/inheritance, src/knowledge -> src/inheritance
  (imported as `inheritance`), make layer1 -> make inheritance; layer2 alias dropped
- inheritance and trained-network bundles named after the manuscript figure
  they feed (fig2_grounding_sweep, figS3_rebaselining, ...), or descriptively
  where they feed none; configs keep their `experiment:` value so parquet
  hashes are unchanged, only output.dir moves
- figure scripts, SI figure sources, notebooks, REPRODUCING.md, README and the
  SI Methods/tables updated; make clean no longer deletes tracked manifests;
  reproduce.sh hashes the s{seed}/ layouts too

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y64o8FKP7rCuXzC48pxpMm

results/sexual_vs_asexual_lineage/README.md

@@ -0,0 +1,31 @@
+# E7 — the advantage of sex: recombination adapts faster than clonal reproduction
+
+**Claim tested.** The dynamic mechanism behind E8: *why* can a recombining society reach capability a
+lone lineage cannot? Because recombination reassorts beneficial variants that arise in different
+sub-lineages, while an asexual (clonal) lineage suffers **clonal interference** — the variants compete
+and cannot combine.
+
+**Setup.** A single population (distribution over `2^L` genotypes, `L=12`) adapts from **all-wrong**
+toward the multi-locus optimum under the composed step: selection (fitness-proportional) + drift
+(resample `n=150`) + mutation (per-locus flips, `μ=0.02`) + recombination. Two arms — **asexual**
+(`recomb_rate=0`) vs **sexual** (`recomb_rate=1`). 20 replicates.
+
+### Symbols
+- **asexual/clonal** = offspring are whole-genotype copies (Layer-1's regime) · **sexual** = loci reassorted across the population each generation.
+- **fitness** = number of correct loci (optimum = `L`) · **linkage disequilibrium |D|** = how far the loci are from statistical independence (correct alleles scattered across different genotypes).
+
+### The two panels
+1. **Advantage of sex.** Mean fitness over generations: the **sexual lineage (red) climbs faster**
+   than the asexual one (grey) through the adaptation phase (gen ~10–35). *Honest scope:* both plateau
+   near the optimum by gen ~40 in this tractable regime — this is a **speed** advantage, not a
+   permanent gap (the single-population Muller's ratchet is subtle to force; E8 carries the headline).
+2. **Mechanism.** Linkage disequilibrium over generations: the asexual lineage spikes to `|D|≈0.04`
+   during adaptation (beneficial alleles held apart, scattered across genotypes), while the sexual
+   lineage stays at `|D|≈0` — it *assembles* them. The LD gap is exactly why sexual adapts faster.
+
+### Takeaway
+Recombination's advantage is real and classical: it combines good ideas that arose independently,
+which clonal reproduction cannot. This is the population-level reason a single evolving model lineage
+degrades or stalls where a recombining **society** climbs — and it grounds the E8 vertical result in
+the evolution-of-sex theory. **Falsifier (not triggered):** if the sexual lineage adapted no faster
+than the asexual one (and kept the same LD), recombination would do no work.