FCM: Standard forms of INVALID arguments

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6 Terms

1
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p —> q

q

∴ p

Fallacy of the converse

2
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<p>p —&gt; q</p><p>~p</p><p><span>∴ ~q</span></p>

p —> q

~p

∴ ~q

Fallacy of the inverse

3
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<p>p v q</p><p>p</p><p><span>∴ ~q</span></p>

p v q

p

∴ ~q

misuse of disjunctive reasoning

4
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<p>p v q</p><p>q</p><p><span>∴ ~p</span></p>

p v q

q

∴ ~p

misuse of disjunctive reasoning

5
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<p>p —&gt; q</p><p>q — r</p><p><span>∴ r —&gt; p</span></p>

p —> q

q — r

∴ r —> p

misuse of transitive reasoning

6
New cards
<p>p —&gt; q</p><p>q —&gt; r</p><p><span>∴ ~p —&gt; ~r</span></p>

p —> q

q —> r

∴ ~p —> ~r

misuse of transitive reasoning