I've posted on that also. For example the predictions are fighting against butterfly effect, and at best double in time when you square the computing power (and that's given unlimited knowledge of initial state!). It's pretty well demonstrable on the weather, for instance, but of course rationalizers can always argue that it 'wasn't demonstrated' for some more complex cases. There are things at which being to mankind as mankind is to 1 amoeba, will only double the ability compared to mankind at best (or much less than double). The LW is full of intuitions where you say that it is to us as we are to 1 amoeba, in terms of computing power, and then it is intuited that it actually can do things as much better than we can, as we can vs amoeba. Which just ain't so.