Good point. I would say that the defining feature of human intelligence is immediate and self-directed teaching. House training a dog takes many weeks and many

Good point. I would say that the defining feature of human intelligence is immediate and self-directed teaching. House training a dog takes many weeks and many rewards. Stopping smoking is a decision that a human makes and can immediately put into practice. Using sharks and dolphins as an example, both would learn to avoid fishing nets and communicate that danger (which is not unique to humans), remember it (which is) to each other and their offspring (again, unique to humans). What's not done is seemingly more important than what is, because beating opposable thumbs is pretty hard (as you've pointed out).