2007-03-12 13:16:34 · 3 answers · asked by IYA 1 in Education & Reference ➔ Homework Help
Affirming the Consequent and Denying the Antecedent.
2007-03-12 13:20:28 · answer #1 · answered by Faye H 6 · 0⤊ 0⤋
Affirming the Consequent
1. If P, then Q .. Q .. Therefore P
Eg: 2. If Chicago is the capital of Illinois (P), then Chicago is in Illinois
Chicago is in Illinois (Q)
Therefore Chicago is the capital of Illinois (P)
3.Invalid because both premises are true and conclusion is false
Denying the Antecedent
1. If P then Q .. Not P .. Therefore not Q
Eg: 2. If Joe is a bachelor (P) then Joe is a male (Q)
Joe is not a bachelor (Not P)
Therefore Joe is not a male (not Q)
3. invalid
2007-03-12 20:50:56 · answer #2 · answered by 3.14159265358979323846 6 · 0⤊ 0⤋
http://www.cuyamaca.net/bruce.thompson/Fallacies/formalfallacies.asp
. Affirming the Consequent
Any argument of the form, "If p then q; and q. Therefore, p."
2. Denying the Antecedent
Any argument of the form, "If p, then q; but not p. Therefore, not q."
2007-03-12 20:20:16 · answer #3 · answered by cmhurley64 6 · 0⤊ 0⤋