Portal:Logic/Did you know

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...that the Law of noncontradiction is the same as the Law of contradiction?
...that nand alone or nor alone make a functionally complete set of logical operators?
...that according to the continuum hypothesis, there is no cardinal number in between aleph null and the cardinality of the continuum?
...that all 24 valid syllogistic forms have names like 'Camestrop' and 'Felapton'?
...that if a statement P implies another statement Q, and a third statement R also implies Q, and either P or R is true; then Q has to be true?
...that the dunce hat was named after a logician?
...that the collective noun for a group of logicians is a "sequitur of logicians"?

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