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The problem is that no model is ever going to be perfect, so do we just discard that technique and stop making predictions based on the data we do have?
But wait JP is in favour of IQ and personality testing which are... models.
I love the guy but this isn't an area for him to get involved with and he was wise pre illness to avoid it.
My personal belief is that we shouldn't be polluting since we can't predict what the polutants will do. So thats stopping CFCs, chemical pollution, greenhouse gasses and plastics anyway, regardless of the predicted magnitude of the threat.
I think he's mostly been parroting what he's been told by Bjorn Lomberg, Micheal Shellenberger, and and some others that have come on his podcast which is definitely a risky thing to do.
That said I think it's right to be skeptical when people start trying to computer model infinitely complex systems, and I do think that in a lot of cases an inaccurate model is worse than no model at all. Whether or not this is true of current climate models though, is above my pay grade.