OK, smartypants. Everything is made of atoms and photons. A shadow is not a "thing", we see shadows where the number of photons is locally reduced. A dream is a particular configuration of atoms in the brain.
OK, smartypants. Everything is made of atoms and photons. A shadow is not a "thing", we see shadows where the number of photons is locally reduced. A dream is a particular configuration of atoms in the brain.
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