Question

Why is the term 'common sense' used if it seems not to be widespread?

Answer 1

common sense is refering to such things that is common, such as do not open a radiator cap when car is hot, or put your coat on its cold(im in indiana) things that the normal person begins learning from a young age and should know as an adult. Although we all go forgetting some of it until it is too late.

Answer 2

Coomon sense is COMMON, it may not seem so to those who dont ahve any common sense, but its self explanatory. Coommon Sense would tell you to duck if you were gonna hit your head, not to touh the hot stove, not to put paper in fire...things of that nature.