So controversial that no credible people will go on record (in non-insane states)? Not indisputably true.

Facts (and predictions) that are hard to obtain or verify, that are essentially answering "is controversial public policy X a good idea?" may earn you scorn or reprisal, so you keep quiet if you're not looking for a career in political gang-warfare. Anyway there's so much noise in that department that it's hard to justify searching for or disseminating such truths.

If I'm wrong, though, feel free to PM / irc / email me any awesome truths. I keep confidences.