>"Intelligence is produced by the brain"
Depends what you mean by produced. If you mean it happens in the brain, then the following would also be true:
- I prefer Strawberry ice cream. Preferences happen in the brain, which is a physical organ. Ice cream preference must be physical.
- I speak English, which is a language, and language happens in the brain, which is a physical organ. English must be physical.
If by produced you are just repeating that you think it is physical, that is begging the question.
Do you argue that every process in a computer is physical, since it all runs on top of hardware? Do you have no conception of software when it comes to the human mind?