> if you're going to assert that it's impossible to know anything
I made no such assertion. I said that the economic models have no track record of successful predictions. We should not be making huge bets based on models that have no track record of successful predictions.
The difficulty is that it is also a huge bet to continue "business as usual". Not making significant changes is also a choice, and based on the best science (indeed, imperfect models) we have so far, it does not look good...
> it is also a huge bet to continue "business as usual"
Yes, but that's true for a lot of reasons that have nothing to do with climate change. I'm simply saying that if we're going to redirect a large amount of resources, we should redirect them to actions that will have a positive impact regardless of things in the future that we can't predict. As I said in my original post in this subthread, I think two important such actions are bringing people out of poverty (since the wealthier people are, the better able they are to adapt to change) and making our infrastructure more robust.
I made no such assertion. I said that the economic models have no track record of successful predictions. We should not be making huge bets based on models that have no track record of successful predictions.