Because it is a product/epiphenomenon of the brain, then it requires a brain, hence no real separation. They are not independent.
Separate but not independent? Does that sound better? I am specifically agreeing that mind is product and so linked to it in an organic way.
However it is true that the brain itself can be damaged with no apparent change to the mind. And I think it is true that there can be damage done to the mind, which does not involve physical damage to the brain. I realize that this is a repeat but bear with me...
if there was someone with a dysfuntion of the mind which we can not yet attribute to some aspect of brain function, we will with time.
But dysfunctional and damaged in mind, does not mean errant brain function. Certainly some things are. But imagine a person overwhelmed by a flood of emotions from a loss of something, such that they lose control in some fashion. I don't think that that would actually be any problem area of the brain, some physical dysfunction, but rather it may be working just fine and the result is a mind out of control or in pain.
Come to think of it I think there was a portion of Sacks' book, Man Who Mistook His Wife For A Hat, that detailed some organic dysfunction, which resulted in healthier minds and vice versa.
holmes
"What you need is sustained outrage...there's far too much unthinking respect given to authority." (M.Ivins)