Mind is the brain?

[Angrboda]

If one of those atoms was holding together the structure of the comp system then this would happen, ofc.  In the same way that if some atom was the last thing between your brain and dissolution...and it were removed, I would expect your brain to cease to be.  Whether something is a comp system is a pass/fail proposition, and a candidate comp mind has further benchmarks to cross.  It's pointless to continue referring to these increasingly specific conditions as arbitrary.  Your position is that there will -never- be such a point where there is no mind?  What about that bit above, where things don't have a mind, but a gazillion spark of mind?  Clearly you allow for precisely what you have objected to.  I simply use more descriptive (and less fanciful) terms.  Your bedroom is full of material interactions, but not all material interactions are comp systems.

My position is that there will be a point at which a system won't meet your definition of a mind, but at which the kind of physical interactions and processes which are the real essence of mind continue on perfectly contentedly.

And those would be precisely which?