I think there is quite a bit of fertile ground to study what kinds of answers really are 'explainable.' The story(ies) I usually bring up in this case are 'Who Sunk the Boat?' and 'The Straw That Broke the Camel's Back.' Any decision process that includes summation to a bound (literally any integrate and fire neuron), is going to require much more complex study to understand the real circumstances under which it fires. If we could build these things we would already know, far, far more about the universe than we do. Maybe I will add a new story to my list: 'Why did the chicken cross the road?'