Savyabhichara (irregular reason)

Biological Parallel

Claim: 'This organism is marine because it has gills.' But lungfish, mudskippers, and amphibian larvae have gills yet aren't marine—the reason is irregular (savyabhichara). The inference fails because the middle term doesn't reliably connect to the conclusion. Biological classification struggles with this: 'lays eggs' doesn't determine taxon (birds, reptiles, monotremes, insects all lay eggs). Irregular reasons work sometimes but fail systematically. Valid inference requires invariant connection, not just frequent association.