Ok prove your false statement.
Why don't you prove that the statement is false? Because, from what I see, you're the only one claiming it to be false.
Burden of proof's on you, buddy.
Person "a" says "what goes up will continue indefinitely" .
Person "b" says "I disagreed with that old foggie Person a, what goes up, MUST come down!"
person "c" says "I disagree with that old man person b "what goes up, generally comes down, but there's some special cases in which it doesn't work like that!"
By disagreeing with person b, person c implicitly also disagrees with person a. It doesn't matter that person b has already disagreed with person A and proved his theories to be off by a bit.