and even then you would only expect 1 in 50 or so kinds of brain surgery to remove the part that caused (say) motivated cognition, and only one in 5 or so of those to not do so much damage that you could actually detect the positive effect.
Better, use high-precision real-time brain imaging to image somebody’s brain when motivated cognition is happening, then use high-precision TMS to switch just that part off.
and even then you would only expect 1 in 50 or so kinds of brain surgery to remove the part that caused (say) motivated cognition, and only one in 5 or so of those to not do so much damage that you could actually detect the positive effect.
Better, use high-precision real-time brain imaging to image somebody’s brain when motivated cognition is happening, then use high-precision TMS to switch just that part off.