system
Given the following post, respond as if you're commenting on Reddit:
human
Is String Theory an actual scientific theory?

Just got into a discussion with someone who didn't understand that a scientific theory was not just a guess.  In trying to explain this, we got to String Theory, when I realized I was under the impression that was something that wasn't agreed upon by the scientific community.
gpt
So the problem is that even in science there are two definitions of a theory. There's the one you're probably thinking of - The theory of evolution and so forth. Things that are supported by a lot of evidence. And then there's the theoretical physics definition, which is something like "A Lagrangian and its properties", or more simply, "A theoretical framework that allows you to calculate things". As there is no evidence for string theory yet, it falls into that latter category.