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A comment on Common Errors in Undergraduate Mathematics (2009). Parent comment

Re:Common Errors in Undergraduate Mathematics (2009) by posterboy on Sunday June 25, 2017 @06:29PM (#14632569)
By the same line of reasoning it would be not false until we have proven it false.
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Re:Common Errors in Undergraduate Mathematics (2009) by dmurray on Monday June 26, 2017 @05:06AM (#14635211)
Yes, we should consider it neither true nor false, and not use the rule (or its negation) to prove whatever it is we actually want to prove.
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