In Zen Buddhism there is a family koan, or riddle, that says, last night I dreamt I

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In Zen Buddhism there is a family koan, or riddle, that says, “last night I dreamt I was a butterfly. How do I know today that I am not a butterfly dreaming I am a man?” Can you relate this to the idea that we construct a version of reality out of the more basic world of physical energies surrounding us?