Some phrases have a very different meaning from the start of their sentences

Some phrases are only used when they are untrue.

"I'm not racist, but ..."

"I'm sure I ..."

"I don't want to contradict you..."

"With all due respect"

"Far be it from me ... "

"It goes without saying..."

"... not to mention ..."

"No offence"

"Oh no, I couldn't possibly"

"Oh go on then - just one."

"I shan't make this a long speech."

"Nothing, darling."

"Serves 4"

"I'm no prude, but ..."

"Family planning"

"Network upgrade"

"Care in the community"

"Back in 5 min"

"I'll just put you on hold for a moment."

"Congratulations! You have been especially chosen/selected ..."