If most things have gotten created in some way, or,
if original ideas pretty much don’t exist,
then how do you get new ideas?
There are several ways to brainstorm and develop ideas.
A powerful tactic is to combine two unrelated things.
1+1=3.
Ideas are combinations of unrelated existing ideas.
Find unrelated ideas that have nothing to do with the current problem you’re trying to solve.
Then combine them with other unrelated ideas.
Two unoriginal discovered ideas combined yield a third undiscovered original idea.