Is the statement "Claims demand evidence" always true?

[robvalue]

I'm not following the idea that evidence is "that which is evident". I'd say evidence makes things become evident.

For example, dropping a ball is evidence of gravity. It makes gravity evident.

It is important that it's evident I've dropped a ball, but that's just a matter of being able to observe the evidence. I'd say anything that is simply an evident event is data.

Of course, being evident is ultimately subjective anyway.