Abstract

In his article ‘Healthy Scepticism’, James Franklin gives an admirable survey of thirteen kinds of attempts to refute what he calls ‘symmetry arguments for scepticism’, finding all of them inadequate. The symmetry argument that he proposes to test is given as follows: Firstly, it is possible that what we perceive is entirely an illusion created by a deceitful demon. Second, there is no reason to prefer the realist hypothesis to this one