That page is partly a study guide. If you have questions about the material when you are studying for the exam after the last class on Wednesday, and after your discussion section, you can try sending me an e-mail or try calling me in my office. Use the Venn diagram technique for all problems. Conifers are trees with no leaves. A ship with two masts may be a sloop.
Some cities are cloudier than Seattle.
Translate the following arguments into categorical form. Most birds can fly. But bats can fly too. So, a few bats are birds. The V-22 Osprey has wings, which no helicopter has.