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Constructive mathematicians do not assert that excluded middle is true since there is no constructive proof of (P not P). Nor do they assert that it is false, since that statement,…

There is only one kind of proof by contradiction. Assume not P, derive a contradiction which implies not not P, then conclude (via excluded middle) P. If you assume P, derive a con…

Constructive mathematics does not affirm excluded middle. That's distinct from rejecting it.