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Lecture

relevance and good grounds

1 Page
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Department
Philosophy
Course Code
PHLB05H3
Professor
Bader

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In some ways, easiest criterion to meet, because it simply must give a reason for the conclusion
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It could be hard because of fallacies
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All good grounds are relevant but not all relevant premises constitute good grounds
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A premise is relevant is it, along with other premises, could provide good grounds for the conclusion
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An irrelevant premise, could never combine with other premises to provide good grounds for the
conclusion.
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Relevance
Analogy
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Refers to a small subset of informal evidence
Amassing statistical evidence and concluding from that
Inductive Evidence
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Deductive
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Conductive
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Types of Relevance
Misrepresenting the argument that we are trying to refute
If one doesn't try to interpret another's argument in the strongest way, one is likely to
misunderstand it -failure of the principle of charity
The straw man
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People who don't know believe at random. They don't systematically get everything wrong.
Positive Ad Hominem can work but negative ones don't
Ad hominem
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We don't know what causes P. Therefore , Q causes P.
We can't disprove P. Therefore, P.
Appeals to ignorance
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Most people believing something should be done, doesn't make it the case.
Opinions change over time and differ from place to place.
Appeal to tradition: appeal to popularity among previous generations
Appeal to progress: appeal to popylarity among our own generation contrary to previous
generations
Appeals to popularity
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Different Types of Relevance Failures
Lecture 3 -Relevance and Good Grounds
17 January 2011
15:11
Lectures Page 1
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Description
Lecture 3 - Relevance and Good Grounds 17 January2011 15:11 Relevance - In some ways, easiest criterion to meet, because it simplymust givea reason for the conclusion - It could be hard because of fallacies - All good grounds are relevantbut not all relevant premisesconstitute good grounds - A premiseis relevantis it, along with other premises, could provide good grounds for the conclusion - An irrelevantpremise, could never combine with other premisesto providegood grounds for the conclusion. Types of Relevance - Analogy - Inductive Evidence Refers to a small subset of informal evidence Amassingstatistical evidenceand concluding from that - Deductive - Conductive DifferentTypes of RelevanceFailures - The straw man Misrepresenting the argumentthat we are trying to refute If one doesnt try
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