Knowledge Is Not A Bank

Now that my children are getting older, it has come to my attention that I have lost access to some of my own knowledge. I learned algebra in school, for example, but now that my son has taken it, I find that the lessons I had all those years ago seem to have slipped through a crack into some inaccessibly cloudy region of my skull. I know I knew it, but I can’t deny that I don’t know it now. And the same is true for much more than my maths.

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