If one uses a time machine to go WAY back into the past and kills some one who may have been his ancestor, then he will cease to exist, which means he would not exist to go back into the past to kill that distant ancestor, which means he will exist, which means…oh fuggetaboutut.
If one uses a time machine to go WAY back into the past and kills some one who may have been his ancestor, then he will cease to exist, which means he would not exist to go back into the past to kill that distant ancestor, which means he will exist, which means…oh fuggetaboutut.