'Aerospace-planes enter commercial service.' —Arthur C. Clarke
- gwern estimated 1% on 2010-10-26
- gwern said “http://www.arthurcclarke.net/?scifi=3” on 2010-10-26
- kallman estimated 55% and said “Isn’t vigin galactic almost set to do the space tourism thing? The timeline is a bit dodgy, sure…” on 2010-11-20
- gwern judged this prediction wrong on 2013-01-01.
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