common sense

I think it should be called uncommon sense, in my case, judging by the messes I can get myself into on a regular basis.

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nooneinparticular: [some] people assign greater meaning to the term common sense.
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Erimitus: Yes some will assign greater (and different) meanings.
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nooneinparticular: They assume that the knowledge is common and as a result assume that anyone that doesn't know or understand it is not as smart or 'uselessly' smart.
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Erimitus: Yes and the irony is that they are the ones who are lacking. It is best not to laugh at them though. They do not realize it.

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Erimitus: Maybe common sense (not being all that common) is a misnomer. Maybe the messes we do not get into far outnumber the one we do but we focus on the bad and ignore the good thereby gaining more common sense.

Possibly.

I've heard this said before, 'Failures are far more useful than success, because success allows you to learn nothing, while failure is an opportunity to learn what went wrong.'

yes