你不必天天自寻麻烦去辨别真伪，但是，如果你有理由认为一枚硬币或一张钞票是假的，也许这些小小的提示将会帮助你。

You don't need to look for trouble ail the time, but if you have reason to think a coin or bill is a counterfeit, perhaps some of these tips will help you out.

youdao

但这类似于说你认为某一枚硬币分布不均，因为你掷了它三次结果都正面朝上。

But this is akin to saying that you know a coin is biased because you flipped it three times and got all heads.

youdao