General Relativity

At this moment, there is no evidence at all that anything can be wrong with general relativity. I mean, at least on the empirical side. So we'll start when we try to marry it with quantum mechanics - you're almost doing something like that here. But also sometimes my impression because I used to work in quantum gravity for quite a few years,. And my impression was that sometimes people take it a bit too light saying that's all and then we have quantum gravity so there is no causal structure.