Everyone knows that life isn't fair. Saying it's not fair suggests that you think life is supposed to be fair, which makes you look immature and naive.

I was blowing, too. But he's been here a few years; he knows how to keep it fair.

It's difficult to find a genuine weakness that makes you appear competent. For instance, telling your interviewer that your weakness is working so hard that you have trouble prioritizing your family life is a little too cliche and comes across as disingenuous.

Technology-fueled change is happening so fast that even a six-month-old process could be outdated. Saying this is the way it's always been done not only makes you sound lazy and resistant to change, but it could make your boss wonder why you haven't tried to improve things on your own.

It is not fair to ask of others what you are not willing to do yourself.

When it comes to getting promoted, you want to present yourself in a way that feeds into the biases that bosses have about what makes someone promotable. You're already doing the hard work, so why not frame your effort in such a way that it increases your chances of obtaining the position you want?