Is atheism a belief?

[Belacqua]

Your two criteria are OK, but there are better ones,

I'm glad you find criteria important for rejecting these claims. 

People sometimes mention pink unicorns as something which we can disbelieve without any criteria. But that seems odd to me, since the criteria for disbelieving in unicorns are very easy:

1) No reliable witness has ever seen one, no skeletal or fossil evidence remains. 

2) They don't appear in medieval manuals about actual hunting, but in fake "natural history" books alongside cynocephalic creatures, which we have good reason to see as fiction. 

These are the facts (as I see them) which I use to reject the existence of unicorns of any color.

In the case of Christ's literal resurrection, I just wanted to show that there are criteria which instantly spring to mind, and for which I am willing to assume a burden of proof. So I'm comfortable with the idea that there are better criteria. In the case of literal resurrection, what criteria do you prefer? 

AND neither yours nor the better ones are "claims" nor are they "beliefs".

Well, I just use "claim" to mean "I assert that it is true," and "belief" to mean "I hold it to be true." But if you want to use different definitions I'll be glad to work with you.