Passage Summary: Because the brightest moths stood out the most and got eaten, the author assumes the darkest moths must have been the best at hiding.

Conclusion: The darkest peppered moths were the ones least likely to be eaten by predators.

Reasoning: The lightest moths had the highest contrast with the tree bark and were therefore the most likely to be eaten.

Analysis: The author falls into a 'relative vs. absolute' trap. Just because the lightest moths were the *most* visible doesn't automatically mean the darkest ones were the *least* visible. It’s possible that medium-gray moths blended in perfectly, while the darkest ones were also quite visible against the bark. The argument ignores the possibility that the 'ideal' camouflage lies somewhere in the middle of the spectrum rather than at the extreme opposite end of the 'most visible' group.