Mistakes: Problems with this word is that; we don’t have a word in English that means “a well-reasoned attempt that didn’t meet expectation.” :)
Here are a few attempts to define mistakes:
» Misjudgments and adverse consequences that were unplanned.
The scale of the consequences differentiates mistakes from lesser errors or slips.
» The failure of a planned sequence of mental or physical activities to achieve
its intended outcome when these failures can’t be left to chance.
It's our attitute that determins how we can convert mistakes into opporutnities which draw usefull learning for better perfomances in future.