错误，过失时，是可数名称吗,mistake是可数名词吗？

网友回答

错误，过失【mistake】是可数名词。
　　N-COUNT 错误;过失If you make a mistake, you do something which you did not intend to do, or which produces a result that you do not want.
　　They made the big mistake of thinking they could seize its border with a relatively small force...
　　他们大错特错，居然认为以较少的兵力就能够夺取其边境地区。
　　I think it's a serious mistake to confuse books with life...
　　我认为把书本同生活混为一谈是大错特错。

网友回答

是的 可数名词
　　Eg:
　　1. I found a mistake in that sentence.
　　我发现那个句子有一个错误。
　　2. You've made several grammatical mistakes in the position.
　　你的作文中犯了几处语法错误。