[Junior]

it can never train itself to create a spider web to catch a deer.

Neither can humans. Does this mean we're irrational? Methinks you are mistaking "rational" with the use of opposable thumbs...

[Alberta's Child]

Monkeys have opposable thumbs, and I have yet to see one who was capable of using (let along creating) a 30.06 rifle to shoot bananas out of a tree.

Maybe humans can't create a real spider web to catch deer, but if you saw what they are using to thin the deer herds in parts of New Jersey you'd have to admit we make a pretty good imitation.