The fact that he resorts to insult shows you his opinions are no longer valid.
That he expresses his opinion this particular way at this particular time, cherry-picked by those who disagree with him, does not mean he has "resorted" to insults. Straw-man argument.
He presumes to know more than the rest of us and is deluded by his own ego, just as Carl Sagan was.
I've met and worked with Prof. Hawking, and he certainly does know more than I. Therefore he is entitled to enjoy what comes from that.
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