Oh dear... "to find the correct answer, we sometimes have to go for the wrong one". Surely if you purposefully select the wrong answer, you would have to know the correct answer. Why you would pick the wrong answer purposefully when you knew it was wrong. This logic would not cut it on Who Wants To Be A Millionaire. "Some might get it right the second time" What?. Why just some?. Even in your world of bonkers logic I would expect everyone to get it right the second time, after all they know the answer, they knew it first time, its just that they choose the wrong answer on purpose the first time. "What really important is what you've learnt, so you won't make the same mistake again" What mistake are you talking about here?. I am puzzled. Is it the mistake of making a purposeful mistake?.

@blindsilence Hi. Sorry for making you puzzled. Logically, no one would go for the wrong one if they knew it's wrong. But we don't always knew. And not all things are multiple-choice questions as in WWTBAM. You would knew if the decision that you made is right or wrong after trials and errors.

I see, now that you have explained it better.