Does a demotion mean no more promotion?

[Visionary]

Well, maybe if you will show a better or excellent performance, you may still be promoted. At our workplace, it's called exceeding expectation. A good work ethics should merit a promotion even if you failed at first. There's always room for change and I believe every company gives second chances. At work, a superior is always looking for staff who is willing to go the "extra mile" meaning you don't just do what is expected of you but you should be willing to do "more" for the company's benefit. That's what you are hired for, to be an asset to the company.