proof是可數嗎?

proofnoun [C or U] (SHOWING TRUTH)    /pruːf/
a fact or piece of information that shows that something exists or is true:[+ that] Do they have any proof that it was Hampson who stole the goods?I have a suspicion that he's having an affair, though I don't have any concrete (=definite) proof.If anyone needs proof of Andrew Davies' genius as a writer, this novel is it."How old are you?" "21." "Have you got any proof on you?"Keep your receipt as proof of purchase.
雖然字典寫proof可以是可數名詞，但所舉例子全是不可數的。因此一般proof也是不可數的。