| Step | Hyp | Ref | Expression | 
						
							| 1 |  | bnj1176.51 |  | 
						
							| 2 |  | bnj1176.52 |  | 
						
							| 3 | 1 2 | syl |  | 
						
							| 4 |  | df-ral |  | 
						
							| 5 | 4 | rexbii |  | 
						
							| 6 | 3 5 | sylib |  | 
						
							| 7 |  | df-rex |  | 
						
							| 8 | 6 7 | sylib |  | 
						
							| 9 |  | 19.28v |  | 
						
							| 10 | 9 | exbii |  | 
						
							| 11 | 8 10 | sylibr |  | 
						
							| 12 |  | 19.37v |  | 
						
							| 13 | 11 12 | mpbir |  | 
						
							| 14 |  | 19.21v |  | 
						
							| 15 | 14 | exbii |  | 
						
							| 16 | 13 15 | mpbir |  | 
						
							| 17 |  | con2b |  | 
						
							| 18 | 17 | anbi2i |  | 
						
							| 19 | 18 | imbi2i |  | 
						
							| 20 | 19 | albii |  | 
						
							| 21 | 20 | exbii |  | 
						
							| 22 | 16 21 | mpbi |  | 
						
							| 23 |  | ax-1 |  | 
						
							| 24 | 23 | anim2i |  | 
						
							| 25 | 24 | imim2i |  | 
						
							| 26 | 25 | alimi |  | 
						
							| 27 | 22 26 | bnj101 |  |