That the Wii's have no disk drives in them.
"Einstein was not, however, an alien visitor, nor a professional basketball player, nor president of the United States. Nor a biologist. Nor an entomologist. Nor an ecologist. Nor a beekeeper. Roni Grosz, curator of the Albert Einstein Archives of the Hebrew University in Jerusalem, tells Gelf, "There is no proof of Einstein ever having said or written it." While Grosz notes that it is extremely difficult to disprove a quote, he "could not remember even one reference to bees in Einstein's writings."
"Trust me. I know what I'm doing." -- Sledge Hammer