True, but I was pretty surprised to see how large the differences were between his breakfast/caffeine state versus fasting state. That's a substantial differenc

True, but I was pretty surprised to see how large the differences were between his breakfast/caffeine state versus fasting state. That's a substantial difference and pretty interesting. I also think just tracking MRI variation (even for n=1) is useful - this kind of detailed longitudinal tracking simply hasn't been published before.