Hey guys. This is my first post. I don't have any background in physics so please don't just throw equations and stuff at me and expect me to understand. So is string theory really a theory? It seems to me that theories need to have evidence to back them up. You need to be able to look and see how it is applied. For the Big Bang theory we can see that the universe is expanding. For evolution we can see that new species arrive, there's mutations in genes, etc. For string theory we have what? Isn't it more of a conjecture or a philosophy? Well just gotta say that you guys seem pretty hardcore from what I've been reading. Hopefully I'll learn some stuff.