Find recurring patterns across sources

Identify the recurring patterns across every source in this notebook — the things that keep showing up but that no single source explicitly names.

Look for:
- Repeated language or framing used to describe the same thing.
- Cause-and-effect chains that appear in multiple sources.
- Common roles, actors, or archetypes that recur.
- Repeated failure modes or success conditions.
- Implicit timelines or sequences that match across sources.

For each pattern:
- Give it a short, memorable name.
- List the 2–4 sources where it appears, with a short quote from each.
- Explain what the pattern suggests that no individual source quite spells out.

Skip anything that any single source already calls out by name. The whole point is to surface what only becomes visible across the set.