Philosophy
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Modus Ponens
p
⊃
q
p
∴
q
If-then
if
then
p
É
q
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
Card Set Information
Author:
Mischief
ID:
38895
Filename:
Philosophy
Updated:
2010-10-04 20:17:54
Tags:
Modus Ponens Modus Tollens Disjunctive Conjunctive Addition Hypothetical Syllogism
Folders:
Description:
9 Rules of Inference
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