Thanks for posting this. I was just thinking of pulling out some of my old logic books, but can only find Ian Hacking on Probability/Induction on my shelf, so I'll order up your recommended book. I'm hoping just pounding all my old formal logic knowledge back into my head will help me on the Games; RC and LR are a breeze for me, but the Games are still killing me. In my past (academic) life, I was on the philosophy faculty at an Ivy, and although I never billed myself as a logician it is in my coursework background and one certainly must be good at logic to succeed in any branch of philosophy-- so you can imagine what my failure to translate those abilities to LG success are doing to my amour-propre!