A philosopher dreamed he was a butterfly, then woke up unsure who was dreaming whom

In a parable from the Zhuangzi, the philosopher dreams he is a butterfly fluttering about with no awareness of being Zhuangzi at all. Waking suddenly, he can no longer be certain: is he a man who just dreamed of being a butterfly, or a butterfly now dreaming that he is a man?

— Zhuangzi (attrib.), Zhuangzi — Inner Chapters, c. 4th century BC — public domain
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