Let's say you like your boss and you don't hate your current job, but you know it's time to look for a new opportunity. You have an interview coming up, and you need to inform your boss that you'll be in late that day. You could either lie to him (e.g. I have a doctor appointment) or tell him the truth (i.e. I have an interview).
So my question is this: Which is less disrespectful? (a) lying to your boss or (b) telling him the truth?
I'm not asking what you should do or what would be the least risky. I'm asking which approach is less disrespectful.