Brain function is clearly not more fundamental than brain. For brain function, you need a brain. The opposite is not true. — Kenosha Kid

I think this is your argument, which kind of reads in a confusing way...:
1. The mind is a brain function.
2. For a brain function you need a brain
3. However a brain doesn't require a brain function to exist. (not relevant)
4. Therefor the mind requires a brain.

Can you see what is wrong with this argument? If you want to convince anybody of your argument, you need to start with a premise that is self evident or easily testable so that everyone will agree at the starting point. Otherwise you have offered a valid argument but not a sound one.

Can you see what is wrong with this argument? — Yohan

Nope, seems pretty solid. If you accept premises 1 and 2, 4 follows. 1 is, as I say, the neuroscientific definition of the mind. 2 is self-evident.

An acceptable definition must be clear, plausible, and internally consistent. It must also either be in correspondence with our intuitions or be supported by arguments that show our intuitions are mistaken.

source https://aphilosopher.drmcl.com/2008/01/04/argument-by-definition/

Again, ticks all the boxes for me. I think you're confusing ' an argument that yields a conclusion I dislike' with 'an invalid argument'.

You don't read people's posts, do you? Yohan's post said nothing about disliking your argument. You also keep avoiding difficult questions.

1. The mind is a brain function.
2. For a brain function you need a brain
3. However a brain doesn't require a brain function to exist. (not relevant)
4. Therefor the mind requires a brain. — Yohan

Nope, seems pretty solid. If you accept premises 1 and 2, 4 follows. 1 is, as I say, the neuroscientific definition of the mind. 2 is self-evident. — Kenosha Kid

from a physicalist point if view, we do not have brain function *and* mind; they're the same thing. — Kenosha Kid

If mind and brain are one and the same then how can you say that you need one to have the other? Is the mind an effect of the brain? If so, then the mind and brain are not the same thing.

from a physicalist point if view, we do not have brain function *and* mind; they're the same thing.
— Kenosha Kid
If mind and brain are one and the same then how can you say that you need one to have the other? — Harry Hindu

I'm looking for the phrase... Oh yes!

You don't read people's posts, do you? — Harry Hindu