One man in Australia a couple of years ago was under the delusion that his father was replaced with a robot and cut off his head.

几年前一名澳大利亚人由于幻想他的父亲,变成了机器人而将他父亲的头砍了下来

耶鲁公开课 - 心理学导论课程节选

And the delusion is that the people you love the most have been replaced.

这种错觉便是你最爱的人,被其他东西替换掉了

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It's an illusion,or a delusion,but he didn't really have the genuine memory.

是幻觉，或者错觉，他没有真正的记忆。

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You develop a particular delusion, like it's getting dark .

我们想象一个特殊的错觉,就像是这里正在变黑

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