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Results for: 'indirect derivation'

9:21

indirect derivation PHIL013AB

By: mcweiner

A video on the indirect derivation rule for proofs.

8:44

conditional derivation proofs PHIL 013AB

By: mcweiner

A nine-minute video about conditional derivation, a new kind of rule. Listen closely for a special appearance from a duck.

8:49

conditional derivation proofs PHIL 013C

By: mcweiner

A nine-minute video about conditional derivation, a new kind of rule. Listen closely for a special appearance from a squeaky raccoon.

5:25

universal derivation PHIL013AB

By: mcweiner

A video on the Universal Derivation rule for predicate proofs, a rule for doing proofs where the SHOW line begins with Ax.

7:29

DD, &O, and &I proofs

By: mcweiner

A video about doing proofs, introducing how to do direct derivations, and the &I and &O rules.

7:39

spontaneous show proofs

By: mcweiner

A video about how to do proofs where you write down SHOW statements that don't come from any particular derivation rule.

7:35

spontaneous show proofs PHIL013AB

By: mcweiner

A video on how to do proofs where you write down SHOW statements that don't come from specific derivation rules.

8:05

Introduction to proofs PHIL 013AB

By: mcweiner

A video on what proofs are, which explains the concept of simple derivation, and how to do proofs with one proof rule, Modus Ponens.