Rodney A. Brooks Quote

I understand, says Schwinger, and I admit that QFT has not solved the causality problem. But at least it has localized the probability aspect to a single event called field collapse-an event that is not covered by the equations of QFT. That is to say (Schwinger's favorite expression), QFT itself is causal, but it only takes us so far. At some point a discontinuous event takes place that is not covered by the theory. It is possible that at some time a theory will be developed for field collapse and it may turn out to be causal after all. On the other hand, it may be that it is a truly probabilistic process, and perhaps God does play dice with the world. Either way, it doesn't detract from what QFT has accomplished.