Across
- 3. based on evidence
- 9. table of truth values
- 10. uses deductive reasoning
- 11. line intersects
- 13. unproven statement
- 14. boxes/arrows
- 17. if p, then q
- 20. if and only if
- 21. if p, then q
- 22. if
Down
- 1. flipped
- 2. "not"
- 4. based on patterns
- 5. negated and flipped
- 6. proves false
- 7. intersect - right angle
- 8. negate both sides
- 10. paragraph
- 12. both true/false
- 15. true or false
- 16. statement that can be proven
- 18. numbered statements
- 19. then