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PCM2 Signal Diagnostics And Open Boundaries

PCM2 is important not only because it documents agreement, but also because it keeps incomplete edges visible.

What This Part Covers

  • phylogenetic signal testing
  • residual and diagnostic review surfaces
  • ancestral reconstruction comparisons
  • the remaining intercept-mode likelihood sweep boundary

Questions This Part Answers

  • Which signal and diagnostic surfaces remain strong enough to discuss?
  • Which comparative edges are still explicitly bounded or open?
  • How does the study separate strong comparative evidence from still-incomplete intercept or sweep boundaries?

Reading Rule

Treat PCM2 as a deeper bounded trust study, not as a blanket claim that comparative model criticism in the repository is already complete. Its open boundaries are part of the study's value, not an embarrassment to hide.