Do you know a koan?
noun, plural ko·ans, ko·an. Zen.
a nonsensical or paradoxical question to a student for which an answer is demanded, the stress of meditation on the question often being illuminating.
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Roaring
ANSWERS: 2
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not sure what youre talking about
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Like Schrodinger's cat? Or what causes photoluminescence? Give an example, please.
pearllederman 
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