Prison (n.) is wherever a man is against his will — so Socrates was never in prison.
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Definition.com
A Prison (n.) is any place you are in against your will — which is why Socrates, there willingly, was never in prison.
Definition.com
Prison (n.) is wherever someone is against his will; Socrates was not in prison, because he was there willingly.
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Prison (n.) is a fact — he was sent to jail; 'he is unhappy' is a thing the onlooker adds himself.
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Prison (n.) holds me only as long as I am needed there: if you need me out, I'll come out; if you need me in again, I'll go back in.
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