I think it may come down to the question of:

"can anything do everything?"

Meaning, as we invent tools that showcase a novel use, further ideas for how that tool can be used start coming to mind. A nail can hang a picture. If a picture can be hanged on the wall, what else can? Larger wooden shelves can be hanged on the wall if we improve the nail by adding a fastener. Now it's more of a 'mount' than a 'hang.' And so on and so forth.

The overarching question be: "what else could the nail hang, if the nail could hang pictures?" "could it hang everything?"