> Its quite possible that we'll find alternatives, or that there's more
> oil
> than experts currently realise. Hard to say.
If this is so, then the long run future of oil is "uncertain" in the sense of and for the reasons given by Keynes re coal. That's all he claimed i.e. Jevons's mistake was to regard what was in fact uncertain in this sense as certain.
The ontological fact of internal relations doesn't mean that nothing is knowable. So long as there is good reason to believe that the relations on which particular phenomena depend, e.g. the relations governing the movement of planets, the relations linking smoking to lung cancer, the relations linking global warming to extreme weather, etc. etc., rational long run prediction of planetary movements, the health effects of smoking, the weather consequences of global warming will be possible.
Ted