| Step | Hyp | Ref | Expression | 
						
							| 1 |  | stle.1 |  | 
						
							| 2 |  | stle.2 |  | 
						
							| 3 | 2 | chshii |  | 
						
							| 4 |  | shococss |  | 
						
							| 5 | 3 4 | ax-mp |  | 
						
							| 6 |  | sstr2 |  | 
						
							| 7 | 5 6 | mpi |  | 
						
							| 8 | 2 | choccli |  | 
						
							| 9 | 1 8 | pm3.2i |  | 
						
							| 10 | 7 9 | jctil |  | 
						
							| 11 |  | stj |  | 
						
							| 12 | 10 11 | syl5 |  | 
						
							| 13 | 12 | imp |  | 
						
							| 14 | 1 8 | chjcli |  | 
						
							| 15 |  | stle1 |  | 
						
							| 16 | 14 15 | mpi |  | 
						
							| 17 | 2 | sto1i |  | 
						
							| 18 | 16 17 | breqtrrd |  | 
						
							| 19 | 18 | adantr |  | 
						
							| 20 | 13 19 | eqbrtrrd |  | 
						
							| 21 |  | stcl |  | 
						
							| 22 | 1 21 | mpi |  | 
						
							| 23 |  | stcl |  | 
						
							| 24 | 2 23 | mpi |  | 
						
							| 25 |  | stcl |  | 
						
							| 26 | 8 25 | mpi |  | 
						
							| 27 | 22 24 26 | 3jca |  | 
						
							| 28 | 27 | adantr |  | 
						
							| 29 |  | leadd1 |  | 
						
							| 30 | 28 29 | syl |  | 
						
							| 31 | 20 30 | mpbird |  | 
						
							| 32 | 31 | ex |  |