This quote from Bertrand Russell just caught my eye:

When one admits that nothing is certain one must, I think, also admit that some things are much more nearly certain than others.

I think the climate change deniers would do very well to keep this in mind.

And putting near certainties aside, in risk management dealing with extremely negative possible outcomes, even great uncertainty is simply not your friend. Would you board a plane when the mechanic tells you, “I’m 95 percent sure the engines will not fail?”

Tim Lambert notes, among other things, that Bjorn Lomborg thinks that is a flight worth taking.