His attempt at rebutting the skeptical criticism “The Modelers Won’t Tell Us How Confident the Models Are” furnishes us with our pseudoscientific excuse. The skeptical objection is

There is no indication of how much confidence we should have in the models. How are we supposed to know if it is a serious prediction or just a wild guess?

and Beck’s retort is

There is indeed a lot of uncertainty in what the future will be, but this is not all because of an imperfect understanding of how the climate works. A large part of it is simply not knowing how the human race will react to this danger and/or how the world economy will develope. Since these factors control what emissions of CO2 will accumulate in the atmosphere, which in turn influences the temperature, there is really no way for a climate model to predict what the future will be.

This is as lovely a non sequitur as you’re ever likely to find. I can’t help but wonder if he blushed when he wrote it; I know I did when I read it. This excuse is absolutely bullet proof. I am in awe of it. There is no possible observation that can negate it. Whatever happens is a win for its believer. If the temperature goes up, the believer can say, “Our theories predicted this.” If the temperature goes down, the believer can say, “There was no way to know the future.”