I think it is quite impossible for folks to sleep-but-not sleeping. It is kind of like testing LSD against a placebo - it is rather obvious after some time has

I think it is quite impossible for folks to sleep-but-not sleeping. It is kind of like testing LSD against a placebo - it is rather obvious after some time has passed which has the real thing and which doesn't. It is still quite obvious that it works. In this case, it'll be somewhat obvious who slept and who did not. There simply isn't a way to fake that. But we can compare the results of different types of sleep.