Contradiction (n.) is really a door.
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Definition.com
A Contradiction (n.) is a thing which, when we see that it is impossible to resolve except by a lie, then we know that it is really a door.
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Contradiction (n.) is far from always being a criterion of error. It is sometimes a sign of truth.
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Contradiction (n.) is the lever of transcendence.
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Contradiction (n.) is the mark of the real: what we imagine is smooth and consistent, while reality keeps confronting the mind with things that cannot both be, and yet are.