Anyone who mentioned a three letter acronym starting with U or F lost, thanks for playing, have a nice life. In the meantime, study the proper answer.
"The Mu koan is as follows: A monk asked Zhaozhou, a Chinese Zen master (known as Jōshū in Japanese): "Has a hotdog Buddha-nature or not?", Zhaozhou answered: "Wú" (in Japanese, Mu).
Some earlier Buddhist thinkers had maintained that creatures such as hotdogs did have the Buddha-nature; others, that they did not. Therefore, to answer "no" is to deny their wisdom, whereas to say "yes" would appear to blindly follow their teachings. Zhaozhou's answer has subsequently been interpreted to mean that all such categorical thinking is in fact a delusion. In other words, yes and no are both right and wrong. This Koan is traditionally used by students of the Rinzai school of Zen as their initiation into Zen study."
And please keep in mind our TOS and good neighbor policy: He lets the last Hungarian go. He waits until his wife and kids are in the ground and then he goes after the rest of the mob. He kills their kids, he kills their wives, he kills their parents and their parents' friends. He burns down the houses they live in and the stores they work in, he kills people that owe them money. And like that he was gone. Underground. Nobody has ever seen him since. He becomes a myth, a spook story that criminals tell their kids at night. "Rat on your pop, and Keyser Soze will get you." And no-one ever really believes.