I certainly haven't "cracked the code", but I have lost fights that there was no way I should have lost and I typically had made a point of using all my spars to be the best I could going into a fight.
Of course there are the invisible attributes, but I mean, my opponents were outmatched in every category and most of them significantly.
And then there is the fact that everybody gets caught.
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With each sunrise, you have a new chance, and with each sunset, you blew it. ~Jack Handy