Does Every Mathematical Concept Exist?

A, does ad and i love play playing devil's advocate on this. Sometimes i believe every conceivable mathematical structure will and a manifestation in reality. We find that now when we study the distant objects, that many stars have planetary systems with all kinds of different properties. So for most purposes, those are universes. I like the idea of not just one universe, but many universes. And i think to do justice to reality, you have to have that idea. If things had been slightly different, the dinosaurs might still be around, and this discussion would be quite different.