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Results for: 'double negation'
proofs vI double negation double arrow PHIL013AB
A video on proof rules for wedge in, double negation, and double arrows. NOTE: if you're using captions, there is a possibility that the software may be displaying double arrows in the captions as single arrows. I wrote [double arrow] in the capti...
proofs vI double negation double arrow PHIL013
A video of just over six minutes about doing proofs with four new rules: or in, double negation, and double arrow in and out.
negation proof rules PHIL013AB
A video on rules for proofs with complex negations, like ~(P & Q), ~(P v Q), and ~(P -> Q).
Sugar makers and community members alike have noticed a large number of sugar maple seedlings this spring. These first year trees were the result of a large seed year in 2019. Sugar maples begin producing seed when they are about 40 years old or 8...