Named for computer science professor and all around cool guy, Dr. Daniel Spiegel, it is the principle in computer science education stating that if something is written, circled, underlined, or otherwise emphasized in the color red, then it is considered to be incorrect within the context of teaching at the time and may never be questioned, lest the questioner be unequivocally annihilated by said cool guy.
"Why is this wrong?" - Dr. Spiegel
"Because it is written in red." - Correct application of Spiegelian Logic, albeit vague