http://www.columbia.edu/~jeh1/mailings/2011/20110126_SingingInTheRain.pdf
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Reiss verified this fact to me, but he later sent the message: "I went back to my book and reread the interview I had with you. I am embarrassed to say that although the book text is correct, in remembering our original conversation, during a casual phone interview with a Salon magazine reporter in 2001 I was off in years. What I asked you originally at your office window was for a prediction of what Broadway would look like in 40 years, not 20. But when I spoke to the Salon reporter 10 years later - probably because I'd been watching the predictions come true, I remembered it as a 20 year question.
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That fable about Hansen has been debunked for over 4 years now. However, news travels slowly in Denierstan. If that news debunks any of their favorite cult myths, it doesn't travel at all. They'll see it, but then pretend they didn't so they'll have an excuse to keep lying.
Point is, Hansen's prediction was for 40 years from a doubling, not for 20 years from the current data. Since we haven't even reached the doubling point of 700 ppm yet, we certainly haven't reached the date of the prediction 40 years after that. The prediction can't be judged until then, so calling it a failed prediction is a big fail in itself.
Hence, deniers still maintain that perfect .000 batting average.