My point is that it would give a rationality/intelligence ratio, so its ability to measure rationality depends on our separate ability to measure intelligence which is currently pretty crude. If we can induce measured degrees of artificial anosognosia, and report at what level each subject can no longer save him or herself with rationality, and measure intelligence, then we could nail down rationality more precisely.

My hypothesis is that the smarter someone is, the more impressed we will be with the extent he or she remained rational while being magnetically stultified.