for me, yes, 1+1 = 2 is platonic. I start going all formalist when thinking about the continuum hypothesis [0]. The more I try to understand what's going on with the number and size of infinities, the more it seems that they're no longer something platonic, just something that drops out of a rule engine operating on a weird formal system.
Disclaimer: not a mathematician so it might be obvious to others that these things exist in platonic space.
Disclaimer: not a mathematician so it might be obvious to others that these things exist in platonic space.
[0] https://en.wikipedia.org/wiki/Continuum_hypothesis