> Language is filled with those types of phrases, the one which bugs me once it was pointed out (even though I use it myself) is "to be honest...", which could carry the implication anything said without that qualifier may be dishonest.

Supernatural highlights this on S1E08, at 27:28. Dean was talking with someone and starts saying "the truth is" but the other person instantly cuts him off saying "you know who starts their sentences with 'the truth is'? Liars".