[ #L0 #HL10 #HL02 |*: /2 width=1 by ext2_refl, sdj_isid_dx/ ] -H1R
lapply (sex_sdj … HL10 f1 ?) /2 width=1 by sdj_isid_sn/ #H
elim (frees_sex_conf_fsge … Hf1 … H) // -H2R -H #f0 #Hf0 #Hf01
[ #L0 #HL10 #HL02 |*: /2 width=1 by ext2_refl, sdj_isid_dx/ ] -H1R
lapply (sex_sdj … HL10 f1 ?) /2 width=1 by sdj_isid_sn/ #H
elim (frees_sex_conf_fsge … Hf1 … H) // -H2R -H #f0 #Hf0 #Hf01