My dumbass parents doubt evolution

[Truth Matters]

Gravity isn't science. Gravity is a Law imposed on our Universe.
Science presumes gravity exists, but cannot cause gravity. We believe gravity exists based on experiences of it, but cannot prove it without arguing in circles.

You're an idiot. Gravity is not "a Law imposed upon the universe". If it is, then which law is it? Newton's? No? Quantum Gravity? No? The curvature of spacetime predicted by General Relativity? No? None of these? But they all "model it" with some degree of correctness with their various "laws".

You think its idiotic to believe a LAW of Gravity is imposed on the Universe? The fact you doubt this is idiotic. You should be embarrassed.
Any epistemic description of gravity has NO BEARING ON THE FACT gravity has an objective ontological reality apart from differing theoretical descriptions.

Mathematics cannot be proven by science. Science rests on certain mathematical assumptions we all reasonably hold to be true, but cannot be proven scientifically without arguing in circles.

Which assumptions are these, precisely?

The assumption that a rational reliable mathematical order exists for one. Science cannot prove this. Science rests on this assumption. Are we not reasonable to believe mathematical truths - just because science cannot prove them?
Idiot.

6) You cannot prove moral knowledge by science. Try proving that raping children is wrong by scientific testing. Do you not believe raping children is wrong?

Ah, you're wrong on this one. It is entirely patterned behaviour.

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Then prove rape is morally wrong by scientific testing.
Idiot.