1. (AvG)>K 2. K>(B>F) 3. A●B ... (Conclusion is triple dot) F So far I've got 4. (AvG)>(B>F) 1,2 Hypothetical syllogism 5. B 3, Simplification 6. A 3, Simplification Here's the rest: 7. AvG 6, Addition 8. K 1,7 Modus Ponens 9. B>F 2,8 Modus Ponens 10. F 9,5 Modus Ponens Edwin