Exercises and Quizzes for 7.6

Quizzes:

Q8.2b PD drop-down for %E
Q8.2c PD Derivations for ^I and %E

Exercises:

      (No QN allowed in these)
8.3ex I Derivations and Strategy
8.3ex II More Complicated Derivations
8.3ex III Logical Truth
8.3ex IV Logical Equivalence
     Selected Answers

      (QN allowed in these)
8.4ex II PD+ Derivations
8.4ex III Logical Truth
8.4ex IV Logical Equivalence
8.4ex V Logical Falsehood and Inconsistency
     Selected Answers