We all understand fear and love and curiosity well enough that we can make rudimentary predictions about them. If I point a gun at someone they will experience

We all understand fear and love and curiosity well enough that we can make rudimentary predictions about them. If I point a gun at someone they will experience fear and respond with fight or flight. If I spend a lot of time with someone and certain compatibility conditions are met, we will experience love and respond with caring behaviors. If I show someone something that they don't understand fully but that has properties that interest them, they'll likely experience curiosity and respond with questions and exploration. Someone who studies these things (a psychologist or neurologist) could make even more sophisticated predictions. We may not have a complete low-level electrochemical model of these phenomenon, but we have a good enough model to make some predictions. But if anything, one of the most salient criticisms of free will is that it doesn't allow us to model and make predictions--in fact, it eschews predictions altogether.