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Published online by Cambridge University Press: 13 October 2009
The ‘why’ question is very deep seated in human nature. Children indeed are always asking such questions: Why is there lightning and thunder? Why is there the sun and moon? Sometimes they ask questions which confound their mentors: e.g. ‘Why is there a universe?’
1 It may be objected that ‘possible’ is not vacuous since its negation is not, since we can say a round square is ‘not possible’. However, here ‘not possible’ is not referring to a meta-physical property nor to the absence of one. ‘Not possible’ simply means in this context that we cannot point to round squares since we know that ‘round’ entails ‘not-square’ and ‘square’ entails ‘not-round’.