PHL 100 Lecture Notes - Lecture 9: Begging The Question, Begging, Modus Ponens
6 Oct 2016
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Moore claims that the proof is perfectly rigorous and that it is perhaps impossible to give a better more rigorous proof of anything whatever . One must know that the premises are true. The conclusion is validly deducible from the premises. We ordinarily accept proofs of this kind. I don"t believe my roommate when he tells me there is beer in the fridge. He can properly prove me to be mistaken by going to the fridge and pointing out a couple of beers. Similarly if we doubt that there are external objects, all that is needed is for us to produce one. The skeptic"s argument purports to show that one cannot know things such as that one has hands. Moore concedes that he didn"t prove that he has hands. However, as already know, proof and certainty are not required for knowledge. Moore seems to beg the question against the skeptic.
