crows can count to the number four, which is as high as humans can
recognize in one clump, say four sheep. More than four of something we have to count. That simply can't be true. Merely playing chess disproves that "recognition clump" of four. Does the lecture cite a cognitive science source for their contention? Eric ------------------------------------------------------------------ To change your Lit-Ideas settings (subscribe/unsub, vacation on/off, digest on/off), visit www.andreas.com/faq-lit-ideas.html