To be fair, he claims it isn't a "natural narrative choice" except for "jokes and anecdotes", and that "natural spoken English" does use the "true present tense". So it is appropriate for answering interview questions, because that would be speaking, not narrating.
You're trying to split hairs. It's quite clear that the medium shouldn't be taken as distinctive here. So whether it's written or spoken, a narrative is a narrative. And that "spoken" refers to talking like in an interview... even though this one is recorded by writing it down. Which is my point... he isn't telling a story or narrating in the interview, so his use of perfect tense isn't hypocritical. The guy's a crackpot with a lot of weird ideas and bad logic, but I'm not going to go out of the way to make up flaws in his consistency that aren't there. There are more than enough that are.
His point about jokes and anecdotes is premised on the notion that past tense is "the voice we use for truth." But solemn vows ("I do"), affirmations of faith ("I believe in one God"), and claims of identity ("I am Iron Man"), are all typically made in present tense.
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