Are We Smart Enough to Know How Smart Animals Are?

The mirror test story is the one that stuck with me longest. Elephants kept failing the classic self-recognition test, the one where you dab a mark on an animal and see if it investigates the mark on its own reflection, and for years that got chalked up as elephants lacking self-awareness. Then somebody scaled up the mirror to elephant size and they passed immediately. The test wasn’t measuring the animal. It was measuring how well the animal fit into an apparatus designed around a chimpanzee’s body.

That’s de Waal’s whole book in one anecdote. He’s a primatologist who’s spent decades watching researchers design cognition tests that quietly assume human categories are the only categories worth measuring, and then treats an animal’s failure to fit those categories as proof of a lesser mind. Ayumu the chimpanzee, who can memorize a scattered sequence of numbers faster than any human tested against him, is the flip side of the same argument, evidence that “smart” isn’t one ladder with us at the top.

I’ll cop to one frustration a few other readers flagged too, de Waal leans on phrases like “most experiments show” or “many studies suggest” more than I’d like from a book this rigorous otherwise, and a couple of times I wanted actual numbers instead of a vague consensus gesture. It’s a minor gripe against an otherwise carefully argued book, but it happened often enough that I noticed the pattern by the halfway point.

Doesn’t require a science background to follow and it’s genuinely fun in places, the crow and chimpanzee political scheming chapters especially. Four stars, and it changed how I watch my neighbor’s dog decide whether I’m worth greeting.