6.6a Exercise: LogiCola D (AE, AM, AH) First appraise intuitively. Then translate into logic (using the letters given) and use the truth-table test to determine validity. LR (LR), L .. R Valid It's in my left hand or 0 0 0 We never my right hand. 0 get true It's not in my left hand. OH 1 prem . It's in my right hand. 1 false concl 1. If you're a collie, then you're a dog. You're a dog. .. You're a collie. [Use C and D.] 2. If you're a collie, then you're a dog. You're not a dog. .. You're not a collie. [Use C and D.] 3. If television is always right, then Apacio is better than Bayer. If television is always right, then Apacio isn't better than Bayer. Television isn't always right. [Use and. ] 4. If it rains and your tent leaks, then your down sleeping bag will get wet. Your tent won't leak. Your down sleeping bag won't get wet. 5. If I get Grand Canyon reservations and get a group together, then I'll explore canyons during spring break. I've got a group together. I can't get Grand Canyon reservations. I won't explore canyons during spring break. 6. There's an objective moral law. If there's an objective moral law, then there's a source of the moral law. If there's a source of the moral law, then there's a God. (Other possible sources, like society or the individual, are claimed not to work.) There's a God. [Use M, S, and G; from C. S. Lewis.] 7. If ethics depends on God's will, then something is good because God desires it. Something isn't good because God desires it. (Instead, God desires something because it's already good.) Ethics doesn't depend on God's will. [Use D and B; from Plato's Euthynhra.]