We have all reached the tipping point, more often than we would like, when, not naturally being aggressively judgemental, we eventually realise somebody we have known for a while is a pathological liar. Or at least has a poor average when it comes to honesty.
After that you cannot believe a single thing (s)he says. Ever again.
In the business world it applies to individuals as well as corporations - a strange, anthropomorphic phenomenon, but I digress.
I could be referring to any number of public figures but ......