I've been meaning to post about this a while ago but something shiny caught my eye and I completely forgot about it. It's a 'thinker' so my apologies for those who haven't had their stimulative beverage yet...
First, there is Common Sense. A lot of people tend to use this term for describing what is (or should be) right, ethical, or commonly known to people in general. The dictionary defines it as 'sound practical judgment that is independent of specialized knowledge, training, or the like; normal native intelligence.'
In comparison, there is Good Sense. Basically a synonym of the aforementioned term, but not quite - as it is defined as 'sound practical judgment; "Common sense is not so common"...' To me, good sense is what would seem to be logical.
I blame N8 for this entirely, but thank him nonetheless: I now have to stop and think about which term I should use when discussing how some people are just inept. Doing something that is logical isn't necessarily common and a lot of people in society do things in common that aren't really all that good.