Textbook Notes (270,000)
CA (160,000)
UOttawa (6,000)
PHI (300)
PHI 1101 (100)
Chapter 7

PHI 1101 Chapter 7: Unit 7 Relevance Assessing Adequacy PHI1101


Department
Philosophy
Course Code
PHI 1101
Professor
Laura Byrne
Chapter
7

This preview shows half of the first page. to view the full 3 pages of the document.
Unit7:RelevanceAssessingAdequacy
PHI1101
Prof.Byrne,Laura
Fall2015
TheThreeCriteriaofaSoundArgument
Thepremisesmustbe:Acceptable,RelevantandAdequate
Relevance
- Ifthepremisesofanargumentarerelevanttotheconclusion,theymustmakeitmore
likely,iftheyaretrue,thattheconclusionistrue.
Example
- Socratesisnotguiltyofcorruptingtheyouth
-Relevant:Hedemonstratesthatjusticeisintrinsicallygood.
-Irrelevant:Heismybestfriend.
Nonsequitur
- Thisisthetraditionaltermforargumentswithirrelevantpremises.
- Latin:Itdoesnotfollow.
KindsofIrrelevantPremises
Manyappealstoirrelevantpremisesappealtofactorsthat,whilepsychologicallypersuasive,
arelogicallyirrelevanttothetruthoftheconclusion.Thatis,eveniftheyaretrue,theydonot
makeitmorelikelythattheconclusionistrue.
FallaciesofRelevance
Thespeakerorwriterappealstoouremotionsofpityorsympathywhentheyarelogically
irrelevanttothetruthofthepropositioninquestion.
Example:Socratesisnotguilty.ThinkofhowXanthippewillsufferifheisconvicted!
Explanation
Xanthippe’ssufferingisnotlogicallyrelevanttowhetherSocratesis,infact,guilty.
AppealtoForce
You're Reading a Preview

Unlock to view full version