Gravity isn't "proven." Heck, I don't even know, a priori, if YOU exist.
All true science is made up of theories that are subject to rigorous re-examination, using a standard, stepwise method.
This is NOT true of faith, which says, essentially, "'cause I said so."
There is no proof that some snake-oils salesman, on his 4th attempt of starting a religion, actually pulled gold out of a hat.
Heck there is no proof that the Son Of God walked the Earth 2000 years ago.
Creationists should NEVER use the word "proof" in their feeble arguments. It makes thos arguments even more feeble.
"Heck there is no proof that the Son Of God walked the Earth 2000 years ago."
The Son of God is an historical figure. He was as real as you and I. You know better than to lie about his existence. Shame on you! Had you said you don't believe in Him, I might have given you a pass, but to blatantly lie about His very existence tells me not to believe the rest of your words.
Yes, the same way evolutionist shouldn't LIE about THEORY being equal with FACT.