Big thread from 2018: https://news.ycombinator.com/item?id=17072662

Little bits from 2016: https://news.ycombinator.com/item?id=11951823, https://news.ycombinator.com/item?id=11606453

Big from 2015, back when Professor Frisby was merely Dr Boolean: https://news.ycombinator.com/item?id=9884616

(I've put 2018 above but it's not clear when the bulk of it was written.)