Note how I said it can be converted to glucose. Note how all you did was describe how it can be converted to glucose. Nowhere did I say that process took nothing. Nowhere did I say it needs only glucose.
Just like your car doesn’t only need gas to function, and can technically ‘run’ on other things like pure alcohol.
There is a 1972 paper that demonstrates normal functioning after prolonged fat adaptation, it’s a great read, but this specifically speaks to brain glucose utilization - https://doi.org/10.1172/JCI107095
Note how I said it can be converted to glucose. Note how all you did was describe how it can be converted to glucose. Nowhere did I say that process took nothing. Nowhere did I say it needs only glucose.
Just like your car doesn’t only need gas to function, and can technically ‘run’ on other things like pure alcohol.
It cannot run directly on fat. FFS, even you described how fat has to be changed first…
Genuinely, your pedantry is pathetic.
All of your statements have implied everything has to become glucose to be used by the brain and that’s not true.