I can't say I haven't learnt anything. Sure it may not be examable, but it is still deep rooted in me.
I often wonder what people can remember about their own lives. I can only think of a few key moments older than 10 years old that have affected me. Such as the moments that I knew I was going to have to get used to the silence, this is humanity after all.
One of the best lessons I learnt was not to label things. Defining them doesn't make them last. If anything they are over the moment you label.