In your OP you never disqualified other types of physics. You merely stated that DC physics were in play and would allow the flash to go insanely fast. "Faster than light travel is allowed, this is DC physics." The subject in that sentence is "faster than light travel", and without any other sentences connected to it (as it is a bulletpoint in a list), the word "this" would refer to the subject; faster than light travel. Here are your options: A. Rewrite your rules so your flash wins B. Admit you lost. You cannot beat the force.