| Step | Hyp | Ref | Expression | 
						
							| 1 |  | cshwshash.0 |  | 
						
							| 2 |  | orc |  | 
						
							| 3 | 2 | a1d |  | 
						
							| 4 |  | simprl |  | 
						
							| 5 |  | simprrl |  | 
						
							| 6 |  | simprrr |  | 
						
							| 7 |  | necom |  | 
						
							| 8 | 7 | biimpi |  | 
						
							| 9 | 8 | adantr |  | 
						
							| 10 | 1 | cshwshashlem3 |  | 
						
							| 11 | 10 | imp |  | 
						
							| 12 | 4 5 6 9 11 | syl13anc |  | 
						
							| 13 |  | disjsn2 |  | 
						
							| 14 | 12 13 | syl |  | 
						
							| 15 | 14 | olcd |  | 
						
							| 16 | 15 | ex |  | 
						
							| 17 | 3 16 | pm2.61ine |  | 
						
							| 18 | 17 | ralrimivva |  | 
						
							| 19 |  | oveq2 |  | 
						
							| 20 | 19 | sneqd |  | 
						
							| 21 | 20 | disjor |  | 
						
							| 22 | 18 21 | sylibr |  |