[This post was primarily written in 2015, after I gave a related talk, and other bits in 2018; I decided to finish writing it now because of a recent SSC post.]
The standard forms of divination that I’ve seen in contemporary Western culture--astrology, fortune cookies, lotteries, that sort of thing--seem pretty worthless to me. They’re like trying to extract information from a random number generator, which is a generally hopeless phenomenon because of conservation of expected evidence. Thus I had mostly written off divination; although I've come across some arguments that divination served as a way to implement mixed strategies in competitive games. (Hunters would decide where to hunt by burning bones, which generated an approximately random map of their location, preventing their targets from learning where the...
I think you maybe miss an entire branch of the tech-tree here I consider important - the bit about the Lindy case of divination with a coin-flip and checking your gut. It doesn't stop at a single bit in my experience; it's something you can use more generally to get your own read on some situation much less filtered by masking-type self-delusion. At the absolute least, you can get a "yes/no/it's complicated" out of it pretty easily with a bit more focusing!
I claim that divination[1] is specifically a good way for routing around the worried self-... (read more)