[CarolinaGuitarman]

"Contentions don't require evidence."

Maybe in your fantasy world. In the real world, however, they do if they are to be taken seriously. Not everybody lives in the world inside your head. :)

"There is no life on Jupiter."

There happens to be evidence that supports this contention. You have not provided any to support YOUR contention that there is a conspiracy to silence evidence that goes against evolution (the existence of such evidence which, if true, would make evolution falsifiable).

[AndrewC]

Maybe in your fantasy world.

Well your world must be Bizarro world.

con·ten·tion    ( P )  Pronunciation Key  (kn-tnshn)
n.

1. The act or an instance of striving in controversy or debate. See Synonyms at discord.
2. A striving to win in competition; rivalry: The teams met in fierce contention for first place.
3. An assertion put forward in argument.

Number 3

as·ser·tion    ( P )  Pronunciation Key  (-sûrshn)
n.

1. The act of asserting.
2. Something declared or stated positively, often with no support or attempt at proof.

Number 2

There happens to be evidence that supports this contention

Not from my fingers.