Hey folks!  This was an overly-ambitious attempt to do a mini-lecture on the Farmer, Dog, Chicken, Grain puzzle and its programming solutions. This was one of the homework questions I had in my Intro to Programming Languages course in the University of Washington's undergraduate Computer Science program, taught at the time by Linda Shapiro. She had us solve this problem in Lisp, Smalltalk, and Prolog. So this is a fairly in-depth technical discussion that might seem a BIT on the boring side, compared to some of my other episodes. But it's 100% something you could find in a computer science course. I'll find a way to. upload the code somewhere, since there's no code formatting available here.