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Results for: 'predicate proofs PHIL013A'
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...
conditional derivation proofs PHIL 013AB
A nine-minute video about conditional derivation, a new kind of rule. Listen closely for a special appearance from a duck. (Edited to add: the squeaking thing is actually a raccoon)
negation proof rules PHIL013AB
A video on rules for proofs with complex negations, like ~(P & Q), ~(P v Q), and ~(P -> Q).
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.
A video about how to do proofs where you write down SHOW statements that don't come from any particular derivation rule.
categorical translations PHIL013AB
A video on the four basic forms of categorical translations: All, some, no, not all/some not.
A video about translating categorical sentences that have complex subjects or predicates.