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44 Cards in this Set
- Front
- Back
Fallacies
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misleading arguments or false causes
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understanding fallacies
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understand what rules they break
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hypothetical syllogism
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if p then q
if q then r therefore if p then r |
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disjunctive syllogism
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p or q
not -p therefore q |
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dilemma
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p or q
if p then r if q then s therefore r or s |
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ad misericordiam
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appealing to pity as an argument for special treatment
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ad populum
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appealing to the emotions of the crowd
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affirming the consequent
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a deductive fallacy
if p then q q therefore p |
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begging the question
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implicitly using your conclusion as a premise (fallacies)
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complex question
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posing an issue in such a way that people can't agree or disagree
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red hearing
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an irrelevant subject that diverts the attention from the main argument
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weasel word
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changing the meaning of a word in the middle of your argument so that your conclusion can be maintained
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ad ignorantiam
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arguing that a claim is true just because it has not been shown to be false (fallacies)
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affirming the consequent
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if p then q
q therefore p (Falacies) |
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Denying the antecedent
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a deductive falacie
if p then q ~ P Therefore ~q |
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Modus Ponens [MP]
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if p then q
p therefore q |
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Modus Tollens [MT]
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mode of taking
if p then q ~q Therefore ~ p |
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Hypothetical Syllogism [HS]
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if p then q
if q then r therefore if p then r |
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Disjuntive Syllogism [DS]
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p or q
~P Therefore Q |
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Dilemma
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p or q
if p then r if q then s therefore r or s |
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Constructive Dilemma
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CD = (P then Q) x (R then S)
P or R Q or S |
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Simplification
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A x B
A B |
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Conjunction
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AxB
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ad hominem
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attacking the person of the authority
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ad misericordiam
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appel to pity
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ad populum
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appel to emotions of the crowd
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affirming the consequent
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if p then q
Q Therefore P (Fallacy) |
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begging the question
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using your conclusion as a premise
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Circular argument
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using your conclusion as a premise (same as begging the question)
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complex question
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Posing a question people cannot agree or disagree with
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denying the antecent
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if p then q
~P Therefore ~Q (fallacy) |
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Equivocation
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stick to one meaning for each term (weasel word)
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False cause
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questionable conclusion about cause and effect
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false dilemma
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reducing the options you consider to two, is unfair to other side
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loaded laguage
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avoid it! avoid language whse only function is to sway the emotions
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non sequitur
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a conclusion that does not follow and is not reasonable from the evidence
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person who fallacy
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Background information is crucial
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persuasive definition
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appear straightforward but in fact is loaded
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petitio principii
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putting your conclusion in your premise (same as begging the question)
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Poisioning the well
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using loaded language to disparage an argument
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post hoc, ergo propter hoc
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(after this, therefore because of this)
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red herring
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an irrelevant subject brought in to divert from main argument
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straw man
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caricaturing an opposing view so that it is easy to refute
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weasel word
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changing the meaning of a word in the middle of the argument so the conclusion stays true
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