I TOLD YOU SO

I was just told "I told you so!" by my 2 year old.
She had the exasperated I-told-you-so tone of voice and everything. 
And she was right.


My mother jokes that she should just start the day off by calling me on the phone and telling me that I was right and she was wrong, just to cover whatever happens in that day.


I wonder at what age I will have to do this too?