| Step | Hyp | Ref | Expression | 
						
							| 1 |  | cdlemg12.l |  | 
						
							| 2 |  | cdlemg12.j |  | 
						
							| 3 |  | cdlemg12.m |  | 
						
							| 4 |  | cdlemg12.a |  | 
						
							| 5 |  | cdlemg12.h |  | 
						
							| 6 |  | cdlemg12.t |  | 
						
							| 7 |  | cdlemg12b.r |  | 
						
							| 8 | 1 2 3 4 5 6 7 | cdlemg12b |  | 
						
							| 9 |  | simp1l |  | 
						
							| 10 |  | simp21l |  | 
						
							| 11 |  | simp1 |  | 
						
							| 12 |  | simp31 |  | 
						
							| 13 | 1 4 5 6 | ltrnat |  | 
						
							| 14 | 11 12 10 13 | syl3anc |  | 
						
							| 15 |  | simp23 |  | 
						
							| 16 | 1 4 5 6 | ltrnat |  | 
						
							| 17 | 11 15 14 16 | syl3anc |  | 
						
							| 18 |  | simp22l |  | 
						
							| 19 | 1 4 5 6 | ltrnat |  | 
						
							| 20 | 11 12 18 19 | syl3anc |  | 
						
							| 21 | 1 4 5 6 | ltrncoat |  | 
						
							| 22 | 11 15 12 18 21 | syl121anc |  | 
						
							| 23 | 1 2 3 4 | dalaw |  | 
						
							| 24 | 9 10 14 17 18 20 22 23 | syl133anc |  | 
						
							| 25 | 8 24 | mpd |  |