| Step | 
						Hyp | 
						Ref | 
						Expression | 
					
						
							| 1 | 
							
								
							 | 
							cdleme46fg.j | 
							⊢  ∨   =  ( join ‘ 𝐾 )  | 
						
						
							| 2 | 
							
								
							 | 
							cdleme46fg.a | 
							⊢ 𝐴  =  ( Atoms ‘ 𝐾 )  | 
						
						
							| 3 | 
							
								
							 | 
							simp11 | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 ) )  →  ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 ) )  | 
						
						
							| 4 | 
							
								
							 | 
							simp13 | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 ) )  →  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  | 
						
						
							| 5 | 
							
								
							 | 
							simp12 | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 ) )  →  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 ) )  | 
						
						
							| 6 | 
							
								3 4 5
							 | 
							3jca | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 ) )  →  ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 ) ) )  | 
						
						
							| 7 | 
							
								
							 | 
							simp2l | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 ) )  →  𝑃  ≠  𝑄 )  | 
						
						
							| 8 | 
							
								7
							 | 
							necomd | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 ) )  →  𝑄  ≠  𝑃 )  | 
						
						
							| 9 | 
							
								
							 | 
							simp2r | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 ) )  →  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  | 
						
						
							| 10 | 
							
								8 9
							 | 
							jca | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 ) )  →  ( 𝑄  ≠  𝑃  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) ) )  | 
						
						
							| 11 | 
							
								
							 | 
							simpl1l | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) ) )  →  𝐾  ∈  HL )  | 
						
						
							| 12 | 
							
								
							 | 
							simpl2l | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) ) )  →  𝑃  ∈  𝐴 )  | 
						
						
							| 13 | 
							
								
							 | 
							simpl3l | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) ) )  →  𝑄  ∈  𝐴 )  | 
						
						
							| 14 | 
							
								1 2
							 | 
							hlatjcom | 
							⊢ ( ( 𝐾  ∈  HL  ∧  𝑃  ∈  𝐴  ∧  𝑄  ∈  𝐴 )  →  ( 𝑃  ∨  𝑄 )  =  ( 𝑄  ∨  𝑃 ) )  | 
						
						
							| 15 | 
							
								11 12 13 14
							 | 
							syl3anc | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) ) )  →  ( 𝑃  ∨  𝑄 )  =  ( 𝑄  ∨  𝑃 ) )  | 
						
						
							| 16 | 
							
								15
							 | 
							breq2d | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) ) )  →  ( 𝑆  ≤  ( 𝑃  ∨  𝑄 )  ↔  𝑆  ≤  ( 𝑄  ∨  𝑃 ) ) )  | 
						
						
							| 17 | 
							
								16
							 | 
							notbid | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) ) )  →  ( ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 )  ↔  ¬  𝑆  ≤  ( 𝑄  ∨  𝑃 ) ) )  | 
						
						
							| 18 | 
							
								17
							 | 
							biimp3a | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 ) )  →  ¬  𝑆  ≤  ( 𝑄  ∨  𝑃 ) )  | 
						
						
							| 19 | 
							
								6 10 18
							 | 
							3jca | 
							⊢ ( ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 ) )  ∧  ( 𝑃  ≠  𝑄  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑃  ∨  𝑄 ) )  →  ( ( ( 𝐾  ∈  HL  ∧  𝑊  ∈  𝐻 )  ∧  ( 𝑄  ∈  𝐴  ∧  ¬  𝑄  ≤  𝑊 )  ∧  ( 𝑃  ∈  𝐴  ∧  ¬  𝑃  ≤  𝑊 ) )  ∧  ( 𝑄  ≠  𝑃  ∧  ( 𝑆  ∈  𝐴  ∧  ¬  𝑆  ≤  𝑊 ) )  ∧  ¬  𝑆  ≤  ( 𝑄  ∨  𝑃 ) ) )  |