Thank you this is very helpful! One more questions – could you more thoroughly explain why the answer to Game 2, question 10 in the Mastery Challenge (lesson 29) is D. I can see why all of the other questions are false, but I am not sure why D is correct. If both types of jazz are not on sale then Pn is on sale. However, the rule states that “if both types of pop are on sale, then all soul is” so I am not sure why just Pn being on sale means that both types of soul must be since we don’t know anything about Pu in this example. If you could help me understand this I would really appreciate it! Thank you!
Oops – I see that I misread the rules and figured it out! 🙂 Thank you for all your help!