2. Main Connectives The main connective of a sentence is the connective outside of any parentheses.

3. Main Connectives The main connective of a sentence is the connective outside of any parentheses. P&(Q&R)

4. Main Connectives The main connective of a sentence is the connective outside of any parentheses. P&(Q&R)

5. Main Connectives The main connective of a sentence is the connective outside of any parentheses. P&(Q&R)

6. Main Connectives The main connective of a sentence is the connective outside of any parentheses. P&(Q&R) ((S>T)&R)>U

7. Main Connectives The main connective of a sentence is the connective outside of any parentheses. P&(Q&R) ((S>T)&R)>U

8. Main Connectives The main connective of a sentence is the connective outside of any parentheses. P&(Q&R) ((S>T)&R)>U

9. Basic Principle for all the Rules: Rules apply to main connectives only! Main Connectives

10. 1) P&(Q&R) 2) P&Q 1 &O 3) R 1 &O Main Connectives Basic Principle for all the Rules: Rules apply to main connectives only!

11. WRONG Main Connectives Basic Principle for all the Rules: Rules apply to main connectives only! 1) P&(Q&R) 2) P&Q 1 &O 3) R 1 &O

12. WRONG Main Connectives Basic Principle for all the Rules: Rules apply to main connectives only! 1) P&(Q&R) 2) P&Q 1 &O 3) R 1 &O

13. Main Connectives Basic Principle for all the Rules: Rules apply to main connectives only! CORRECT 1) P&(Q&R) 2) P 1 &O 3) Q&R 1 &O

14. Main Connectives Basic Principle for all the Rules: Rules apply to main connectives only! 4) (L&E)>P 5) L4 &O 6) E>P4 &O

15. Main Connectives Basic Principle for all the Rules: Rules apply to main connectives only! WRONG 4) (L&E)>P 5) L4 &O 6) E>P4 &O

16. Main Connectives Basic Principle for all the Rules: Rules apply to main connectives only! WRONG 4) (L&E)>P 5) L4 &O 6) E>P4 &O

17. Main Connectives Basic Principle for all the Rules: Rules apply to main connectives only! Line (4) is a conditional. Its main connective is > not & ! So &O cannot be applied! 4) (L&E)>P 5) L4 &O 6) E>P4 &O WRONG For more click here