-
Wow, you read all that from a simple throw away remark?
Ok here' the 'common sense' comment in context. My local council (Rossendale) was literally run by Billie the fish fryer and Doris the florist (names changed for anonymity). They made a £10,000 decision to import sand into an open area in the town centre to simulate a beach. Not much common sense used in that decision was there. So, according to your thinking, when the locals chit chatted and said 'not much common sense those councillors' we were inferring all of the above?
It's typically used to trivialise the view that discrimination and prejudice are wrong. It's a cliche and meaningless, and gets thrown in when the argument has otherwise been lost, very often by people who would love to be just a little bit racist/sexist/homophobic, cause a little bit of "harmless" offence, have a laugh at people because of the colour of their skin and not be frowned upon.