"Ten weird signs that you are highly intelligent, according to science" - Intelligent people recognise that they have made mistakes – and learn from them quickly.
Some of them have to be made in order to fully understand. Real effort is avoiding doing them twice. As life goes on, hopefully the numbers of mistakes we have to make will reduce. :-)
Absolutely. The road to success is paved with failures. No one gets every answer right on the first try, I certainly don't. A wise man knows his limitations.
Probably. The tough part is recognizing what the mistake was or will be. Usually, a person won't know until it's too late. Does my answer make any sense at all? I hope it does.
Benedict Arnold 