translation.en: And worse -- not having an easy way to see them, because in visual illusions, we can easily demonstrate the mistakes; in cognitive illusion it's much, much harder to demonstrate the mistakes to people.
translation.zh: 更糟的是，要认识到这些错误并不容易。 在视觉错觉上，我们很容易证明错误； 可是要向人们证明他们认知上的错觉， 却非常艰难。