To resolve the grandfather paradox, Lewis suggests that there is a semantic Can vs Cannot distinction between what a human can physically do (kill the grandfather) and logically cannot do (cannot kill the grandfather).

Could someone please describe the counterarguments of other philosophers and responses to the counterarguments.

(Have looked online but would now really appreciate the thoughts of members on this platform)

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    Vranas (2009) disagrees with Lewis’ solution by suggesting that there is a hidden assumption that t is possible to kill the grandfather in the human logical sense of ‘can’. Vranas suggests a new solution which appeals to many-worlds hypothesis. Are there any solutions which philosophers have suggested which do not entail multiple universes? – Maths Dec 10 '18 at 14:04

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