Lecture 2

We discussed some issues from the quiz:

• Less common ways to phrase "if p, then q"
• Meaning of "neither p nor q"
• Difference between contrapositive and converse
• Negation of "p and q"

We also did exercises on

• Chained implication
• Making formulas from truth tables

Announcements

• You should now be reading Piazza and have done today's pre-lecture reading and quiz. If that isn't the case, see the notes for the first lecture.
• Reminder of pre-lecture readings/quiz for Tuesday. Also remember to get started on the math prerequisites quiz before the last minute.
• We expect pre-lecture quizzes for Tuesdays to be available Friday afternoon, and quizzes for Thursdays to be available Tuesday afternoon.
• If you log on to moodle and don't see 173 listed, look for an "enroll in course" option. If that fails, email Lenny Pitt to get added to 173 by hand.
• HW 1 is posted, due next Wednesday.
• Interesting freshman seminar (limited enrollment)
• We collected names of folks who are still trying to get officially into the class.
• If you want to take the proficiency exam, sign up by Thursday.
• No discussion sections this week. (They start next week.)