And 8hrs credit is not even close, try more like 14hrs.
Huh? Since when does anyone get credit for sitting on the ground for 2 hours during loading?
Don't you mean the clock keeps ticking for the FTL limitation?
Fortunately, no captain would be foolish enough to use discretion, right? And, if he tried to use discretion, the crew he must consult with before making a decision would inform him that they would be too fatigued to complete the pattern, right? And, if he still planned to use discretion, the crew who already indicated they felt unsafe to continue due to fatigue would have no choice but to declare themselves unfit for duty, right?