We call this the MWC light speed theory. Anything that remotely looks like light moves at the speed of light without expecting. It's pretty much the point where we stop arguing and deem ourselves victorious.
Ah yes, the Samus Power Beam Corollary. It's in most major physics textbooks by now.
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"The courtroom is the garden of holy judgment. Those with lechery in their hearts should leave this sanctuary at once!" ~Franziska von Karma