Yet another weird SF fan


I'm a mathematician, a libertarian, and a science-fiction fan. Common sense? What's that?

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Yet another weird SF fan
 

Wednesday, July 13, 2011

Substitutions

Once you have proved a2b2 = (a + b)(ab), you have also proved p2q2 = (p + q)(pq). If a syllogism is valid, you can substitute other terms in it and it will still be valid.

In related news, Dale Carrico wrote:

IV. To declare that money is speech is to ensure that only money talks.
It makes just as much (or as little) sense to say:
IVa. To declare that print is speech is to ensure that only print talks.
I won't more than mention the fact that, according to VI, I do not exist or that XLII sounded familiar.

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