I can feel your anger

[Napoléon]

But we aren't debating what the factual state of affairs is. We're talking about how and why we have certain beliefs--in particular, if the standard for belief in p is that there is evidence for p, why should I believe in evidentialism? Where is the evidence for it?

Evidence is not a belief system

Get that into your head.

You are suggesting that to use evidence you need evidence to back up the fact you need evidence.
This is plain stupidity. You don't take evidence based on a leap of faith, you take it because it is what is used to discern the world around you.

You can get into a philosobabble debate about it all you want, but unless you come up with some other way of a verifiable, testable, reasonable and logical system of interpreting the world around you, then you don't have a leg to stand on, and are frankly talking in complete bollocks and hypotheticals.

How do you know that evidentialism is the only rational way to look at the world? Or is that just an article of faith for you?

Because it is testable. Try to keep up.

Sure, the 'evidence' (however defined) either exists or it doesn't. I never claimed otherwise.

The question is how you know that we should care about the evidence. How do you know that we should correlate our beliefs with the evidence available to us?

Well if you don't then you are ignoring the whole point evidence in the first place.

Suppose someone disagreed with evidentialism. That is, suppose someone believed, "There are at least some propositions for which there is no evidence, but that we should affirm belief of."

How would you prove them wrong?

That's not my job. Burden of proof is on them to prove it right.

It's the same sort of question as asking, "suppose someone believed: there are at least some leprechauns in the world for which there is no evidence, but that we should affirm as beliefs

Prove them wrong"

How ridiculously retarded.

If evidentialism is truly the only rational worldview--that is, every rational worldview must include evidentialism--then you should be able to demonstrate some contradiction in the above person's belief.

Can you provide such a contradiction?

Yes, "where is the evidence for you to believe such a thing".