I agree. Somebody has to be the most important person ever. If Elizer really has made significant contributions to the future of humanity, he's much more likely to be that most important person than a random person out of 10^N candidates would be.
The argument would be that Eliezer should doubt his own ability to reason if his reason appears to cause him to think he is 1 in 10^N. My claim is that if this argument is true everyone who believes in (1) and thinks N is large should, to an extremely close approximation, have just as much doubt in their own ability to reason as Eliezer should have in his.
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