The FBT Theorem asserts that if reality outside the observer has any structure beyond probability, then natural selection will shape perception to ignore it. The theorem makes no assumptions about the states of reality beyond the claim that we can discuss their probabilities. This claim could be false. But if it is, then a science of reality is impossible, for there would be no way to relate probabilistic outcomes of experiments to probabilistic claims about reality. Perhaps a science of reality is not possible. I hope otherwise.
