No, other things have actual proof due to their applicability. Gravity, for example, can be proven by throwing a rock into the air and seeing what happens.
You can't show that that's gravity and not some supernatural being manipulating things in such a way that looks like gravity (note, this is exactly the same as your argument). In fact, I just tested this, but the only "evidence" I have that the pen actually fell to the ground is my memory - how do I know it actually happened?
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