| Step | Hyp | Ref | Expression | 
						
							| 1 |  | hbra1 |  | 
						
							| 2 |  | alrim3con13v |  | 
						
							| 3 | 1 2 | e0a |  | 
						
							| 4 |  | ax-5 |  | 
						
							| 5 |  | hbra1 |  | 
						
							| 6 | 4 5 | hbral |  | 
						
							| 7 |  | alrim3con13v |  | 
						
							| 8 | 6 7 | e0a |  | 
						
							| 9 |  | idn2 |  | 
						
							| 10 |  | simpl |  | 
						
							| 11 | 9 10 | e2 |  | 
						
							| 12 |  | simpr |  | 
						
							| 13 | 9 12 | e2 |  | 
						
							| 14 |  | idn3 |  | 
						
							| 15 |  | pm3.2an3 |  | 
						
							| 16 | 11 13 14 15 | e223 |  | 
						
							| 17 | 16 | in3 |  | 
						
							| 18 |  | en3lp |  | 
						
							| 19 |  | con3 |  | 
						
							| 20 | 17 18 19 | e20 |  | 
						
							| 21 |  | idn3 |  | 
						
							| 22 |  | eleq2 |  | 
						
							| 23 | 22 | biimprcd |  | 
						
							| 24 | 13 21 23 | e23 |  | 
						
							| 25 |  | pm3.2 |  | 
						
							| 26 | 11 24 25 | e23 |  | 
						
							| 27 | 26 | in3 |  | 
						
							| 28 |  | en2lp |  | 
						
							| 29 |  | con3 |  | 
						
							| 30 | 27 28 29 | e20 |  | 
						
							| 31 |  | idn1 |  | 
						
							| 32 |  | simp3 |  | 
						
							| 33 | 31 32 | e1a |  | 
						
							| 34 |  | simp2 |  | 
						
							| 35 | 31 34 | e1a |  | 
						
							| 36 |  | ralcom |  | 
						
							| 37 | 36 | biimpi |  | 
						
							| 38 | 35 37 | e1a |  | 
						
							| 39 |  | simp1 |  | 
						
							| 40 | 31 39 | e1a |  | 
						
							| 41 |  | trel |  | 
						
							| 42 | 41 | expd |  | 
						
							| 43 | 40 13 33 42 | e121 |  | 
						
							| 44 |  | trel |  | 
						
							| 45 | 44 | expd |  | 
						
							| 46 | 40 11 43 45 | e122 |  | 
						
							| 47 |  | rspsbc2 |  | 
						
							| 48 | 47 | com13 |  | 
						
							| 49 | 38 46 33 48 | e121 |  | 
						
							| 50 |  | equid |  | 
						
							| 51 |  | sbceq2a |  | 
						
							| 52 | 50 51 | ax-mp |  | 
						
							| 53 | 52 | biimpi |  | 
						
							| 54 | 49 53 | e2 |  | 
						
							| 55 |  | sbcoreleleq |  | 
						
							| 56 | 55 | biimpd |  | 
						
							| 57 | 33 54 56 | e12 |  | 
						
							| 58 |  | 3ornot23 |  | 
						
							| 59 | 58 | ex |  | 
						
							| 60 | 20 30 57 59 | e222 |  | 
						
							| 61 | 60 | in2 |  | 
						
							| 62 | 8 61 | gen11nv |  | 
						
							| 63 | 3 62 | gen11nv |  | 
						
							| 64 |  | dftr2 |  | 
						
							| 65 | 64 | biimpri |  | 
						
							| 66 | 63 65 | e1a |  | 
						
							| 67 | 66 | in1 |  |