Ideas from 'Some Judgements of Perception' by G.E. Moore [1922], by Theme Structure

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11. Knowledge Aims / B. Certain Knowledge / 2. Common Sense Certainty
Arguments that my finger does not exist are less certain than your seeing my finger
                        Full Idea: This really is a finger ...and you all know it. ...I can safely challenge anyone to give an argument that it is not true, which does not rest upon some premise which is less certain than is the proposition which it is designed to attack.
                        From: G.E. Moore (Some Judgements of Perception [1922], p.228), quoted by John Kekes - The Human Condition 01.3
                        A reaction: [In Moore's 'Philosophical Studies'] This is a particularly clear statement from Moore of his famous claim. I'm not sure what to make of an attempt to compare a sceptical argument (dreams, demons) with the sight of a finger.