Isn't there a medical condition that makes people forget the waking period after they go to sleep, and so begin the next day with a mindset (progressively) falling behind the world? Suppose you offer someone with this condition a half-day-long experience which would be as worthy (considering their actual goals) as anything they would ever have a chance of doing, if they agree to forget it immediately?

How much is half a day worth, if you only have a day, yet are reasonably certain you'all be around tomorrow?