79. Example: P Q, P ~Q P Q P ~Q T T T F T T F
80. Example: P Q, P ~Q P Q P ~Q T T T F T T F F
81. Example: P Q, P ~Q Unsatisfiable P Q P ~Q T T T F T T F F
82. Example: P ~Q, P Q P ~Q P Q T T T F T F F T F
83. Example: P ~Q, P Q P ~Q P Q T T T T T F T F F T F
84. Example: P ~Q, P Q P ~Q P Q T F T T T T F T F F T F
85. Example: P ~Q, P Q P ~Q P Q T F F T T T T F T F F T F
86. Example: P ~Q, P Q P ~Q P Q T F F T T T T T F F T F F T F
87. Example: P ~Q, P Q P ~Q P Q T F F T T T T T T F F T F F T F
88. Example: P ~Q, P Q P ~Q P Q T F F T T T T T T T F F T F F T F
89. Example: P ~Q, P Q P ~Q P Q T F F T T T T T T T F F T F F T T F F T F
90. Example: P ~Q, P Q P ~Q P Q T F F T T T T T T T F F T F F F F T F
91. Example: P ~Q, P Q P ~Q P Q T F F T T T T T T T F F T F F T F F T F
92. Example: P ~Q, P Q P ~Q P Q T F F T T T T T T T F F T F F T T F F T F
93. Example: P ~Q, P Q Satisfiable P ~Q P Q T F F T T T T T T T F F T F F T T F F T F
94. Summary of indirect-table tests: Test Procedure Results Satisfiability Place T under the main connective of each formula If there is at least one row where every formula can be T, the set is satisfiable. Validity Place T under every premise, F under conclusion If there is a row where premises are true and conclusion is false, argument is invalid.