| Step | Hyp | Ref | Expression | 
						
							| 1 |  | idn1 |  | 
						
							| 2 |  | idn3 |  | 
						
							| 3 |  | en3lplem1VD |  | 
						
							| 4 | 1 2 3 | e13 |  | 
						
							| 5 | 4 | in3 |  | 
						
							| 6 |  | 3anrot |  | 
						
							| 7 | 1 6 | e1bi |  | 
						
							| 8 |  | idn3 |  | 
						
							| 9 |  | en3lplem1VD |  | 
						
							| 10 | 7 8 9 | e13 |  | 
						
							| 11 |  | tprot |  | 
						
							| 12 | 11 | eleq2i |  | 
						
							| 13 | 12 | anbi1i |  | 
						
							| 14 | 13 | exbii |  | 
						
							| 15 | 10 14 | e3bir |  | 
						
							| 16 | 15 | in3 |  | 
						
							| 17 |  | jao |  | 
						
							| 18 | 5 16 17 | e22 |  | 
						
							| 19 |  | 3anrot |  | 
						
							| 20 | 1 19 | e1bir |  | 
						
							| 21 |  | idn3 |  | 
						
							| 22 |  | en3lplem1VD |  | 
						
							| 23 | 20 21 22 | e13 |  | 
						
							| 24 |  | tprot |  | 
						
							| 25 | 24 | eleq2i |  | 
						
							| 26 | 25 | anbi1i |  | 
						
							| 27 | 26 | exbii |  | 
						
							| 28 | 23 27 | e3bi |  | 
						
							| 29 | 28 | in3 |  | 
						
							| 30 |  | idn2 |  | 
						
							| 31 |  | dftp2 |  | 
						
							| 32 | 31 | eleq2i |  | 
						
							| 33 | 30 32 | e2bi |  | 
						
							| 34 |  | abid |  | 
						
							| 35 | 33 34 | e2bi |  | 
						
							| 36 |  | df-3or |  | 
						
							| 37 | 35 36 | e2bi |  | 
						
							| 38 |  | jao |  | 
						
							| 39 | 18 29 37 38 | e222 |  | 
						
							| 40 | 39 | in2 |  | 
						
							| 41 | 40 | in1 |  |