Both the brain and a chair are made of the same fundamental particles, following the same physics. Yet, no one believes the chair experiences anything. The core problem of the materialist frame is why the atoms that make up the brain are able to experience anything.

> By `how` you mean the mechanics of it or something else?

He means something else, but human language really has a problem of expressing this.

I'd say he means what remains to be explained once you have explained the mechanical how.

To where or what or who are the experiences relaid? What is it?

Also known as the question of "what the hell is I".