One of the most instructive aspects of the Bluefish Caves story is the light it sheds on how scientific debates about extraordinary claims play out — and specifically about the role of methodological advancement in resolving disputes that cannot be settled by the methods available when the evidence was first collected.

The skepticism about Cinq-Mars’s original Bluefish Caves findings was, as noted earlier, not irrational given the evidence and methods available at the time.

The stratigraphic issues were real, the taphonomic methods for distinguishing stone-tool cuts from natural damage were less developed than they have since become, and the claims being made were extraordinary relative to the existing scientific consensus.

But there was also a dimension of the skepticism that went beyond methodological rigor.

The “Clovis first” model had been the dominant paradigm for so long that challenging it carried specific career risks for researchers who made the attempt.