About how intelligence loses fire and ceases to be Photo: Alexey Dushutin / "New Gazeta" To think is to be a person. Notice, not Cogito Ergo Sum. It's not about SUM now. Cogito Ergo Homo Sum. Homo is not the one who walks on two legs and wears a smartphone in a pocket. Rather, not only this one. This is also one who feels differently ; It’s not like that, say, a mantle, biting the head of the male, or lightning, when one-and-only residential house beats in a clean field.