Logical Arguments PDF
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Logical Arguments September 3, 2012 Logical Arguments – 1 Logical Arguments LogicalArguments • Logic • Parts • Example1 • Example2 • Valid • ValidityTest • Sound • SoundEx1 • SoundEx2 • SoundEx3 • SoundnessCheck • FalsePremises1 • FalsePremises2 • FalsePremises3 • SoundEx4 • SoundEx5 • Silly • Ethical • AcceptReject • Reject • MoralEx1 • MoralEx2 • MoralEx3 CaseStudies Logical Arguments – 2 Logical Arguments LogicalArguments An argument is a chain of reasoning designed to • Logic • Parts prove something. • Example1 • Example2 • Valid • ValidityTest • Sound • SoundEx1 • SoundEx2 • SoundEx3 • SoundnessCheck • FalsePremises1 • FalsePremises2 • FalsePremises3 • SoundEx4 • SoundEx5 • Silly • Ethical • AcceptReject • Reject • MoralEx1 • MoralEx2 • MoralEx3 CaseStudies Logical Arguments – 2 Logical Arguments LogicalArguments An argument is a chain of reasoning designed to • Logic • Parts prove something. • Example1 • Example2 •Valid An argument is a set of statements, some of which • ValidityTest •Sound serve as premises, one of which serves as a • SoundEx1 • SoundEx2 conclusion, where the premises are intended to • SoundEx3 • SoundnessCheck provide evidence for the conclusion. • FalsePremises1 • FalsePremises2 • FalsePremises3 • SoundEx4 • SoundEx5 • Silly • Ethical • AcceptReject • Reject • MoralEx1 • MoralEx2 • MoralEx3 CaseStudies Logical Arguments – 2 Parts of an Argument LogicalArguments An argument consists of: • Logic • Parts • Example1 • Example2 • Valid • ValidityTest • Sound • SoundEx1 • SoundEx2 • SoundEx3 • SoundnessCheck • FalsePremises1 • FalsePremises2 • FalsePremises3 • SoundEx4 • SoundEx5 • Silly • Ethical • AcceptReject • Reject • MoralEx1 • MoralEx2 • MoralEx3 CaseStudies Logical Arguments – 3 Parts of an Argument LogicalArguments An argument consists of: • Logic • Parts • One or more premises • Example1 • Example2 • Valid • ValidityTest • Sound • SoundEx1 • SoundEx2 • SoundEx3 • SoundnessCheck • FalsePremises1 • FalsePremises2 • FalsePremises3 • SoundEx4 • SoundEx5 • Silly • Ethical • AcceptReject • Reject • MoralEx1 • MoralEx2 • MoralEx3 CaseStudies Logical Arguments – 3 Parts of an Argument LogicalArguments An argument consists of: • Logic • Parts • One or more premises • Example1 •Example2 • A conclusion • Valid • ValidityTest • Sound • SoundEx1 • SoundEx2 • SoundEx3 • SoundnessCheck • FalsePremises1 • FalsePremises2 • FalsePremises3 • SoundEx4 • SoundEx5 • Silly • Ethical • AcceptReject • Reject • MoralEx1 • MoralEx2 • MoralEx3 CaseStudies Logical Arguments – 3 Parts of an Argument LogicalArguments An argument consists of: • Logic • Parts • One or more premises • Example1 •Example2 • A conclusion • Valid • ValidityTest • Sound • SoundEx1 • SoundEx2 What is missing? • SoundEx3 • SoundnessCheck • FalsePremises1 • FalsePremises2 • FalsePremises3 • SoundEx4 • SoundEx5 • Silly • Ethical • AcceptReject • Reject • MoralEx1 • MoralEx2 • MoralEx3 CaseStudies Logical Arguments – 3 Parts of an Argument LogicalArguments An argument consists of: • Logic • Parts • One or more premises • Example1 •Example2 • A conclusion • Valid •ValidityTest • A claim that the conclusion follows from the premises • Sound • SoundEx1 • SoundEx2 • SoundEx3 • SoundnessCheck • FalsePremises1 • FalsePremises2 • FalsePremises3 • SoundEx4 • SoundEx5 • Silly • Ethical • AcceptReject • Reject • MoralEx1 • MoralEx2 • MoralEx3 CaseStudies Logical Arguments – 3 Example Argument LogicalArguments • A cat will not live forever. • Logic • Parts • Example1 • Example2 • Valid • ValidityTest • Sound • SoundEx1 • SoundEx2 • SoundEx3 • SoundnessCheck • FalsePremises1 • FalsePremises2 • FalsePremises3 • SoundEx4 • SoundEx5 • Silly • Ethical • AcceptReject • Reject • MoralEx1 • MoralEx2 • MoralEx3 CaseStudies Logical Arguments – 4
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