1. P V Q
2. Q -> (R & S)
3. (R V P) -> T / T
| 4. ~T AIP
| 5. ~(R V P) 3,4, MT
| 6. ~R & ~P 5, DM
| 7. ~R 6, Simp
| 8. ~R V ~S 7, Add
| 9. ~(R & S) 8, DM
|10. ~Q 2,10, MT
|11. Q V P 1, Comm
|12. P 11,10, DS
|13. P V R 12, Add
|14. R V P 13, Comm
|15. T 14,3, MP
|16. T & ~T 15,4, Conj.
17. T 4-16 IP
Edwin