That depends, people can be smart but malicious, non-coorperative, or selfish.

The prisoner’s dilemma shows that there are systems where individually, the “smart” individual thing to do is globally non-optimal.

Even smartness and altruism alone isn’t enough. Medical professionals are smart and out to help others, but any ER doc/nurse will tell you they have limited trust in their patients (rightly so in the real world).

Does “everyone is smart” also include both “altruism and cooperative trust in others”?

Can that barrel hold fluids? B/c then what about the ocean or even the atmosphere? (Though it would take a while)

Could’ve held one rod end in each hand, letting middle of rope ladder hang down for standing on, like stirrups

Alternate left/right and you can step in any direction into the air