## Problem 140 — rank:148

**Title:** Evolution of developmental programmes

**Added binding assumptions (LaTeX):**

```latex
Specify whether $Y_g$ is a mean phenotype, a distribution or a realized stochastic outcome, and define viability accordingly. A finite known genotype graph makes existence of a viable path a standard reachability question; the residual task is learning its biological edges and evaluating evolutionary accessibility. Give an evolutionary time horizon and path-event probability. Viable intermediates need not be selectively favored or likely to fix.
```

**Direct edits:** 0. **Fresh external checks:** None; supplied sources retained as provenance.