| Step | Hyp | Ref | Expression | 
						
							| 1 |  | zfac |  | 
						
							| 2 |  | nfnae |  | 
						
							| 3 |  | nfnae |  | 
						
							| 4 |  | nfnae |  | 
						
							| 5 | 2 3 4 | nf3an |  | 
						
							| 6 |  | nfnae |  | 
						
							| 7 |  | nfnae |  | 
						
							| 8 |  | nfnae |  | 
						
							| 9 | 6 7 8 | nf3an |  | 
						
							| 10 |  | nfnae |  | 
						
							| 11 |  | nfnae |  | 
						
							| 12 |  | nfnae |  | 
						
							| 13 | 10 11 12 | nf3an |  | 
						
							| 14 |  | nfcvf |  | 
						
							| 15 | 14 | 3ad2ant2 |  | 
						
							| 16 |  | nfcvf |  | 
						
							| 17 | 16 | 3ad2ant1 |  | 
						
							| 18 | 15 17 | nfeld |  | 
						
							| 19 |  | nfcvf |  | 
						
							| 20 | 19 | 3ad2ant3 |  | 
						
							| 21 | 17 20 | nfeld |  | 
						
							| 22 | 18 21 | nfand |  | 
						
							| 23 |  | nfnae |  | 
						
							| 24 |  | nfnae |  | 
						
							| 25 |  | nfnae |  | 
						
							| 26 | 23 24 25 | nf3an |  | 
						
							| 27 | 15 20 | nfeld |  | 
						
							| 28 |  | nfcvd |  | 
						
							| 29 | 20 28 | nfeld |  | 
						
							| 30 | 27 29 | nfand |  | 
						
							| 31 | 22 30 | nfand |  | 
						
							| 32 | 26 31 | nfexd |  | 
						
							| 33 | 15 20 | nfeqd |  | 
						
							| 34 | 32 33 | nfbid |  | 
						
							| 35 | 9 34 | nfald |  | 
						
							| 36 | 26 35 | nfexd |  | 
						
							| 37 | 22 36 | nfimd |  | 
						
							| 38 | 13 37 | nfald |  | 
						
							| 39 | 9 38 | nfald |  | 
						
							| 40 |  | nfcvd |  | 
						
							| 41 |  | nfcvf2 |  | 
						
							| 42 | 41 | 3ad2ant2 |  | 
						
							| 43 | 40 42 | nfeqd |  | 
						
							| 44 | 9 43 | nfan1 |  | 
						
							| 45 |  | nfcvd |  | 
						
							| 46 |  | nfcvf2 |  | 
						
							| 47 | 46 | 3ad2ant1 |  | 
						
							| 48 | 45 47 | nfeqd |  | 
						
							| 49 | 13 48 | nfan1 |  | 
						
							| 50 | 22 | nf5rd |  | 
						
							| 51 | 50 | adantr |  | 
						
							| 52 |  | sp |  | 
						
							| 53 | 51 52 | impbid1 |  | 
						
							| 54 |  | nfcvd |  | 
						
							| 55 |  | nfcvf2 |  | 
						
							| 56 | 55 | 3ad2ant3 |  | 
						
							| 57 | 54 56 | nfeqd |  | 
						
							| 58 | 26 57 | nfan1 |  | 
						
							| 59 |  | simpr |  | 
						
							| 60 | 59 | eleq2d |  | 
						
							| 61 | 60 | anbi2d |  | 
						
							| 62 | 61 | anbi2d |  | 
						
							| 63 | 58 62 | exbid |  | 
						
							| 64 | 63 | bibi1d |  | 
						
							| 65 | 44 64 | albid |  | 
						
							| 66 | 58 65 | exbid |  | 
						
							| 67 | 53 66 | imbi12d |  | 
						
							| 68 | 49 67 | albid |  | 
						
							| 69 | 44 68 | albid |  | 
						
							| 70 | 69 | ex |  | 
						
							| 71 | 5 39 70 | cbvexd |  | 
						
							| 72 | 1 71 | mpbii |  | 
						
							| 73 | 72 | 3exp |  | 
						
							| 74 |  | axacndlem2 |  | 
						
							| 75 |  | axacndlem1 |  | 
						
							| 76 |  | nfae |  | 
						
							| 77 |  | nfae |  | 
						
							| 78 |  | simpr |  | 
						
							| 79 | 78 | alimi |  | 
						
							| 80 |  | nd2 |  | 
						
							| 81 | 80 | pm2.21d |  | 
						
							| 82 | 79 81 | syl5 |  | 
						
							| 83 | 77 82 | alrimi |  | 
						
							| 84 | 76 83 | alrimi |  | 
						
							| 85 | 84 | 19.8ad |  | 
						
							| 86 | 73 74 75 85 | pm2.61iii |  |