Nov 10, 2011

Posted by in Fallacy of the Week | 0 Comments

Fallacy of the Week – Fallacy of Irrelevant Thesis

Fallacy of Irrelevant Thesis _ involves proving a valid point, but not the point at issue.

A type of “red herring” fallacy (Ignoratio elenchi) “ignorance of refutation”.

Example taken from Dr Jason Lisle’s book “Discerning Truth”:

Suppose I was the sole survivor of an airplane crash. When a reporter asks me how it was that I was able to survive, it would be fallacious for me to reply, “Because if I hadn’t survived, I would not be here to answer your question.” Although it is true that I would not be around to answer the question had I died, this really doesn’t answer the question itself-why I was able to survive. All fallacies of irrelevant thesis can be rebutted with this simple phrase: “True perhaps, but irrelevant.”        -Dr. Jason Lisle, Discerning Truth p. 81

 

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