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by gweinberg 667 days ago
It helps if you are forgetful in a certain way. If you can remember to buy new toothpaste when you get the last tube out of the drawer, you don;t need a sentinel. But if you forget that the tube you just brought out is your last 5 minutes after you took it out, the sentinel reminds you.

Similarly with the emoji list. If can reliably remember which emoji is last, then each is equally as good as a sentinel. But if you can't, having one which is "special" will help remind you.