Originally posted by Pawnokeyhole So, if no one thinks of an idea, does it exist?
That's trickier.
Dr. Scribbles maintains all logical proofs and number exist even if no one is around to contemplate them.
I am not so sure.
I'd take the view that all numbers exist. Ideas do not and sets of numbers (say the prime numbers) do not exist until they are conceptualized. Perhaps one could take the view that they exist in potentia but really that's stretching.