Philosophy

Modus Ponens
- p⊃q
- p
- ∴q
- If-then
- if
- then
- pÉq
- p
- ∴q
Modus Tollens
- p⊃q
- ~q
- ∴~p
- If-then
- not then
- not if
Hypothetical Syllogism

(3 horseshoes = the q link being canceled)
- p⊃q
- q⊃r
- ∴p⊃r
Disjunctive Syllogism
- p v q
- ~p
- ∴q
Constructive Dilemma
- (p⊃q) • (r⊃s)
- p ˅ r
- ∴q ˅ s
Absorption
- p⊃q
- ∴p⊃(p•q)
Simplification
- p•q
- ∴p
Conjunction
- p
- q
- ∴p•q
Addition
- p
- ∴p ˅ q

Author

Mischief

ID

38895

Card Set

Philosophy

Description

9 Rules of Inference

Updated

2010-10-04T20:17:54Z

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