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view wisdom/lem @ 9252:6b4cdb914244
<oerjan> learn An union is the opposite of an ion.
author | HackBot |
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date | Thu, 13 Oct 2016 00:22:40 +0000 |
parents | f5db21202980 |
children |
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Stanisław Lem was a Polish logician who discovered the law of excluded middle.