Well this is normally how it goes.....
*My sister and I make a list before going grocery shopping and when done we get in the car and drive to the store*
(Inside the store)
My sister: Okay let me see the grocery list please.
Me: What list? I thought you grabbed it.
My sister: Um no. I told you to.
Me: Oh I thought you said you were getting it.
My sister: No I told you to!
Me: Oh sorry. Guess we have to wing it. xD
The above happens 90-95% of the time(though sometimes it is her that forgets the list and not me) and the reminder we actually remember to take the list we made. lol