Clive Thompson, in his wonderful book Smarter Than You Think: How Technology Is Changing Our Minds for the Better, explains why this shift in load-sharing is so natural. We all take to search engines like Google so easily, he explains, because it is an extension of something humans have been doing for ages. “Transactive memory” is our tendency to store information in those around us to make up for our horrible ability to remember things. I rely on my wife for transactive memory about the names of our friends’ kids, my best friends’ birthdays, and dates longer than five years ago. I now store information in the kids about our household schedule and ever-changing routine. Their schoolwork also makes them a handy reference for quick knowledge on the basic properties of science and geography. I like to drop what they know into my stories to pretend I am more knowledgeable than I am.
Source : http://www.slate.com/articles/life/family/2014/03/parenting_the_slow_process_of_taking_care_of_children_until_they_start_to.html