for something running on 20 watts (the average computer runs on about 30 to 70 watts) the brain is extremely powerful
then again it is a literal neural network designed by half a billion years (single celled life existed for longer than that, but multicellular organisms have existed for about 500 million) of evolution and a good bit of luck
ok my question is how did they measure how the brain runs on 20 watts
idk I just googled it