Not a lie

Here, have some cake.
-What?
Cake.  You're in shock, you need some sugar.
-(takes bite) I hate cake.
Good, you're feeling better enough to remember that you hate cake.  Have another bite.
-(takes bite)  Wha--What's going on here?  What happened?  I demand--
Ah, good.  You're feeling better enough to make hysterical demands.  You've probably had enough cake.