Paradox seems a strong word for something that could have any number of legitimate reasons behind it. There is no compelling, logical reason to expect that bec

Paradox seems a strong word for something that could have any number of legitimate reasons behind it. There is no compelling, logical reason to expect that becasue crows can differentiate between humans, we should be able to differentiate between them. You would expect crows to need to be able to identify predators pretty precisely, whereas humans have little reason to differentiate between different members of the crow species becasue our survival would never depend on it.