learn

<!-- Extended Metadata (non-official, preserved for framework compatibility) -->
<!-- ο.class: "occurrent" | ο.mode: "independent" -->
<!-- λ.in: lambda-skill | λ.out: 1-parse, INDEX | λ.kin: schema, lambda-compound -->
<!-- τ.goal: compound knowledge; preserve η≥4, Κ-monotonicity -->

# Learn