Wednesday, November 28, 2007

6.231 It is a property of assertion that one can understand it as double negation.

It is a property of “1+1+1+1” that one can understand it as “(1+1) = (1+1)”.

Assertion is hardly what I would call an expression, although “1+1+1+1” is. He means something like signs/symbols in use, it seems.

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