When someone makes a mistake because they didn't know any better, we call them, perhaps, naive.
When someone makes a mistake and they didn't know any better but <b>should</b> have, we call them ignorant.
Someone who makes a mistake and <b>did</b> know better, now that person we call an idiot.
And I, gentle reader, am an idiot.
On Saturday I ran longer than I ever have, much longer, TOO much longer. By Saturday evening, my left foot was killing me and I was barely able to walk on Sunday.
Now, in hindsight, I recall that runners are usually advised not to increase "long runs" by more than 10% each time. I knew this, having read it in various books and articles, but of course I was too much of genius to actually remember this salient piece of knowledge when I really needed it.
I missed my run today but at least my foot seems to be healing and hopefully I haven't done any real damage to it.