So a guy tickles a rat and the rat makes sounds. This apparently amounts to "laughing" and somehow should make us feel the rat more closely resembles a human.
We’re distant cousins, it’s not surprising we have common traits.
AFAIK, there is no single trait that is qualitatively human. We distinguish ourselves quantitatively (our fine motor skills, the size of our working memory and culture).
AFAIK, there is no single trait that is qualitatively human. We distinguish ourselves quantitatively (our fine motor skills, the size of our working memory and culture).