Compare it to the recent excitement when an ape was found to stockpile throwing stones for later use. The key cognitive steps are creating abstractions of the usefulness of the object, and of a not-here-not-now situation, and putting the two together.

__________________
"Neither man nor nation can exist without a sublime idea."
Fyodor Dostoyevsky, 1821 - 1881
QOTD

My BLOG: Things Have Changed