Originally Posted by
Cookenbauer
That's solid logic...but kind of incomplete. Fatigue studies helped craft duty days from numerous examples that the idea of having solid duty times is due to the fact that you might be fatigued and not realize it. Or the idea that you may think you will be ok by the time you get to the end of the tunnel, only to find out you arent.
Your right, our right, the right, to divert for fatigue reasons has already been highlighted by the FAA as the safest option.
So your choices are.
Dont fly
Choose to fly and decide your too tired partway and divert.
Fly and complete the flight without fatigue
When you hit fatigue, you should stop, no matter what.