Originally Posted by Acting Like Godot
Most people don't know that. They just think of gravity as meaning "Things fall down, not up". Which is a rather misguided notion of what gravity is. Nevertheless they would confidently say: "Yes I always believe in gravity."
But would this confidence really be misguided? They have always observed the effects of gravity, so they believe/know that it's there. Knowing that everything exerts gravity on everything else may increase understanding, but I wouldn't say that you would get more confident in its existence because of it.