1. Myth: Is it possible to reanimate a headless corpse as a thrall, and have him/her still be headless?
Answer: Unknown?
2. Myth: Does the use of only ONE fist decrease unarmed damage output as opposed to having both left and right unarmed?
Answer: Unknown?
1. No. When someone is decapitated, they are put in a state much like if they were vaporized. They can no longer be reanimated.
2. No. Damage is calculated by what you use to hit someone. If you hit them with your right hand, it's the same damage no matter what is in your left hand.
And yeah these are just questions, not myths...