Comment by schuyler2d

A friend of mine argued that "math is invented" rather than discovered. This seemed wrong to me and in arguing against it I found https://plato.stanford.edu/entries/nominalism-mathematics/

At least at this stage I think it relates to whether you believe "the universe"/reality is a sort of momentary collection of the currently-existing things. Vs seeing reality as the set of all things that might obstruct "me" or any entity from doing something.

To me, even if the wall is invisible it's still a wall