Now you are starting to sound like notbatman in his flat earth thread. Gravity is not a theory. It is a fact,
Evolution and gravity are scientific theorys (https://en.wikipedia.org/wiki/Scientific_theory) you are confusing it with the word hypothesis (https://en.wikipedia.org/wiki/Hypothesis)
To say that evolution and gravity are theories is to say that they are not known to exist factually.
Gravity exists. People use it all the time everyday.
Evolution doesn't exist that we know of.