The rock on top of the computer wouldn’t count into the “amount doing the computation”. Apart from that, I agree that weight shouldn’t be the right quantity. A better way to formulate what I am getting at would maybe be that “probability of being a mind is an extensive physical quantity”. I have updated the post accordingly.
Regarding your second paragraph: No, the TV screens aren’t part of the matter that does the computation.
The rock on top of the computer wouldn’t count into the “amount doing the computation”. Apart from that, I agree that weight shouldn’t be the right quantity. A better way to formulate what I am getting at would maybe be that “probability of being a mind is an extensive physical quantity”. I have updated the post accordingly.
Regarding your second paragraph: No, the TV screens aren’t part of the matter that does the computation.