Foley/Altstaetter Theorem Share definition Flag Everything is 50/50, either it happens or it doesn't. According to the Foley/Altstaetter Theorem, I have a 50/50 chance of winning the lottery this week. Foley/Altstaetter Theorem by Foley November 15, 2004 0 0 Get merch Get the Foley/Altstaetter Theorem mug. Buy Now — $32.95 See more merch