| Step | Hyp | Ref | Expression | 
						
							| 1 |  | cdlemk4.b |  | 
						
							| 2 |  | cdlemk4.l |  | 
						
							| 3 |  | cdlemk4.j |  | 
						
							| 4 |  | cdlemk4.m |  | 
						
							| 5 |  | cdlemk4.a |  | 
						
							| 6 |  | cdlemk4.h |  | 
						
							| 7 |  | cdlemk4.t |  | 
						
							| 8 |  | cdlemk4.r |  | 
						
							| 9 |  | cdlemk4.z |  | 
						
							| 10 |  | cdlemk4.y |  | 
						
							| 11 |  | cdlemk4.x |  | 
						
							| 12 |  | simp1l |  | 
						
							| 13 |  | simp3ll |  | 
						
							| 14 |  | simp1 |  | 
						
							| 15 |  | simp22l |  | 
						
							| 16 |  | simp22r |  | 
						
							| 17 | 1 5 6 7 8 | trlnidat |  | 
						
							| 18 | 14 15 16 17 | syl3anc |  | 
						
							| 19 | 2 3 5 | hlatlej1 |  | 
						
							| 20 | 12 13 18 19 | syl3anc |  | 
						
							| 21 | 1 2 3 4 5 6 7 8 9 10 11 | cdlemk38 |  | 
						
							| 22 | 12 | hllatd |  | 
						
							| 23 | 1 5 | atbase |  | 
						
							| 24 | 13 23 | syl |  | 
						
							| 25 | 1 2 3 4 5 6 7 8 9 10 11 | cdlemk35 |  | 
						
							| 26 | 2 5 6 7 | ltrnat |  | 
						
							| 27 | 14 25 13 26 | syl3anc |  | 
						
							| 28 | 1 5 | atbase |  | 
						
							| 29 | 27 28 | syl |  | 
						
							| 30 | 1 3 5 | hlatjcl |  | 
						
							| 31 | 12 13 18 30 | syl3anc |  | 
						
							| 32 | 1 2 3 | latjle12 |  | 
						
							| 33 | 22 24 29 31 32 | syl13anc |  | 
						
							| 34 | 20 21 33 | mpbi2and |  | 
						
							| 35 | 1 3 5 | hlatjcl |  | 
						
							| 36 | 12 13 27 35 | syl3anc |  | 
						
							| 37 |  | simp1r |  | 
						
							| 38 | 1 6 | lhpbase |  | 
						
							| 39 | 37 38 | syl |  | 
						
							| 40 | 1 2 4 | latmlem1 |  | 
						
							| 41 | 22 36 31 39 40 | syl13anc |  | 
						
							| 42 | 34 41 | mpd |  | 
						
							| 43 |  | simp3l |  | 
						
							| 44 | 2 3 4 5 6 7 8 | trlval2 |  | 
						
							| 45 | 14 25 43 44 | syl3anc |  | 
						
							| 46 | 2 3 4 5 6 7 8 | trlval5 |  | 
						
							| 47 | 14 15 43 46 | syl3anc |  | 
						
							| 48 | 42 45 47 | 3brtr4d |  |