It's a game. Swearing on (fill in relative/pet/favorite band/body part) never means anything. It's grade school type stuff. Anyone who feels the need to "swear on" things is LYING. There is no easier way to determine if someone is lying to you. This is Erika's best move, even though I think she still may lose. Keepin her word in a game built on lying is not worth $450K. Do you think Janelle would pass up half a million to "keep her word" to someone she barely knows while playing a game based on who can lie better? If you think she would, then you're lying to yourself. And if you say you wouldn't do the same thing as Erika for $500K, then your lying as well. Unless, of course, you swear on your mother that you're not.