Yes and no.
If I tell you that if you swim in mayonaise for a month it'll cure your cancer, and you do, and it does, does that mean mayonaise cures cancer?
Hypnosis is like that. If you believe that it will help you, it will. If you believe a post hypnotic suggestion will stay in your subconcious it will (allthought really, very likely in your concious but you'll want to play along.)
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