| Step | Hyp | Ref | Expression | 
						
							| 1 |  | latjass.b |  | 
						
							| 2 |  | latjass.j |  | 
						
							| 3 |  | simpl |  | 
						
							| 4 |  | simpr2 |  | 
						
							| 5 |  | simpr3 |  | 
						
							| 6 |  | simpr1 |  | 
						
							| 7 | 1 2 | latj32 |  | 
						
							| 8 | 3 4 5 6 7 | syl13anc |  | 
						
							| 9 | 1 2 | latjcl |  | 
						
							| 10 | 9 | 3adant3r1 |  | 
						
							| 11 | 1 2 | latjcom |  | 
						
							| 12 | 3 6 10 11 | syl3anc |  | 
						
							| 13 | 1 2 | latjcl |  | 
						
							| 14 | 3 4 6 13 | syl3anc |  | 
						
							| 15 | 1 2 | latjcom |  | 
						
							| 16 | 3 5 14 15 | syl3anc |  | 
						
							| 17 | 8 12 16 | 3eqtr4d |  |