| Step | Hyp | Ref | Expression | 
						
							| 1 |  | lcfl6.h |  | 
						
							| 2 |  | lcfl6.o |  | 
						
							| 3 |  | lcfl6.u |  | 
						
							| 4 |  | lcfl6.v |  | 
						
							| 5 |  | lcfl6.a |  | 
						
							| 6 |  | lcfl6.t |  | 
						
							| 7 |  | lcfl6.s |  | 
						
							| 8 |  | lcfl6.r |  | 
						
							| 9 |  | lcfl6.z |  | 
						
							| 10 |  | lcfl6.f |  | 
						
							| 11 |  | lcfl6.l |  | 
						
							| 12 |  | lcfl6.c |  | 
						
							| 13 |  | lcfl6.k |  | 
						
							| 14 |  | lcfl6.g |  | 
						
							| 15 |  | df-ne |  | 
						
							| 16 |  | eqid |  | 
						
							| 17 | 13 | ad2antrr |  | 
						
							| 18 | 14 | ad2antrr |  | 
						
							| 19 | 1 2 3 4 10 11 12 13 14 | lcfl2 |  | 
						
							| 20 | 19 | biimpa |  | 
						
							| 21 | 20 | orcomd |  | 
						
							| 22 | 21 | ord |  | 
						
							| 23 | 15 22 | biimtrid |  | 
						
							| 24 | 23 | imp |  | 
						
							| 25 | 1 2 3 4 7 9 16 10 11 17 18 24 | dochkr1 |  | 
						
							| 26 | 1 3 13 | dvhlmod |  | 
						
							| 27 | 4 10 11 26 14 | lkrssv |  | 
						
							| 28 | 1 3 4 2 | dochssv |  | 
						
							| 29 | 13 27 28 | syl2anc |  | 
						
							| 30 | 29 | ssdifd |  | 
						
							| 31 | 30 | ad3antrrr |  | 
						
							| 32 |  | simprl |  | 
						
							| 33 | 31 32 | sseldd |  | 
						
							| 34 | 13 | ad3antrrr |  | 
						
							| 35 | 14 | ad3antrrr |  | 
						
							| 36 |  | simprr |  | 
						
							| 37 | 1 2 3 4 5 6 7 16 8 9 10 11 34 35 32 36 | lcfl6lem |  | 
						
							| 38 | 25 33 37 | reximssdv |  | 
						
							| 39 | 38 | ex |  | 
						
							| 40 | 15 39 | biimtrrid |  | 
						
							| 41 | 40 | orrd |  | 
						
							| 42 | 41 | ex |  | 
						
							| 43 |  | olc |  | 
						
							| 44 | 43 19 | imbitrrid |  | 
						
							| 45 | 13 | adantr |  | 
						
							| 46 |  | eldifi |  | 
						
							| 47 | 46 | adantl |  | 
						
							| 48 | 47 | snssd |  | 
						
							| 49 |  | eqid |  | 
						
							| 50 | 1 49 3 4 2 | dochcl |  | 
						
							| 51 | 45 48 50 | syl2anc |  | 
						
							| 52 | 1 49 2 | dochoc |  | 
						
							| 53 | 45 51 52 | syl2anc |  | 
						
							| 54 | 53 | 3adant3 |  | 
						
							| 55 |  | simp3 |  | 
						
							| 56 | 55 | fveq2d |  | 
						
							| 57 |  | eqid |  | 
						
							| 58 |  | simpr |  | 
						
							| 59 | 1 2 3 4 9 5 6 11 7 8 57 45 58 | dochsnkr2 |  | 
						
							| 60 | 59 | 3adant3 |  | 
						
							| 61 | 56 60 | eqtrd |  | 
						
							| 62 | 61 | fveq2d |  | 
						
							| 63 | 62 | fveq2d |  | 
						
							| 64 | 54 63 61 | 3eqtr4d |  | 
						
							| 65 | 14 | 3ad2ant1 |  | 
						
							| 66 | 12 65 | lcfl1 |  | 
						
							| 67 | 64 66 | mpbird |  | 
						
							| 68 | 67 | rexlimdv3a |  | 
						
							| 69 | 44 68 | jaod |  | 
						
							| 70 | 42 69 | impbid |  |