Intermediate Logic Week 6

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Across
  1. 4. propositions can be true at the same time
  2. 5. _______ rules of inference
  3. 6. Go between the __________
  4. 7. __________ it by the horns
  5. 10. dilemma negating the consequent
Down
  1. 1. not all propositions are true
  2. 2. formal _______ of validity
  3. 3. dilemma two modus ponens stuck together
  4. 8. __________ the horns
  5. 9. a valid argument which presents a choice between two conditionals