"Now let's examine a special case, the only living being that uses its brain better than us: the dolphin. It is estimated that this incredible animal uses 20% of its cerebral capacity. In particular, this allows it to have an echolocation system that is more efficient than any sonar ever invented by mankind. But the dolphin did not invent the sonar — it developed it, naturally. And this is the crucial part of our philosophical reflection we have today: can we therefore conclude that humans are more concerned with "having" than "being"?"