I don't know but I'm utterly amazed at the sheer number of anecdata comments here all completely ignoring the title's premise which is worded in a way that make

I don't know but I'm utterly amazed at the sheer number of anecdata comments here all completely ignoring the title's premise which is worded in a way that makes you think "what did you do, simulate a bird brain from scratch?" So, thanks for being the only sane comment.