Theory 75/Dissolution
Species Is a Convenience
The claim
Species is not a natural kind but a convention imposed on a continuum, so questions that presuppose sharp boundaries lack an answer.
01Mechanism
Reproductive isolation and divergence are gradients; the boundary is chosen for utility.
02Prediction
Boundary placement should vary by criterion without resolving.
03Refutation
Criteria converging on one partition would remove the continuum.