> Non-physical thoughts cannot be observed We wouldn't even be able to talk about them, because if we did, there would be a causal chain starting with a non-ps

> Non-physical thoughts cannot be observed We wouldn't even be able to talk about them, because if we did, there would be a causal chain starting with a non-psysical thought and ending with moving a (physical) tongue. So somewhere along that chain, a non-physical thing would need to make a physical thing move. How exactly?