There are a lot more than two decision theories. Most are designed to do equally well or better than both causal and evidential decision theory in Newcomb-like problems and even more exoticsetups.
The basic idea in all of them is that, instead of choosing the best decision at any particular decision point, they choose the best decision-making algorithm across possible world states.
There are a lot more than two decision theories. Most are designed to do equally well or better than both causal and evidential decision theory in Newcomb-like problems and even more exotic setups.
The basic idea in all of them is that, instead of choosing the best decision at any particular decision point, they choose the best decision-making algorithm across possible world states.