Tu-n [PRO [te...] audes [...Sosiam esse] dicere] , qui ego sum?
you-S-NOM-Y/N you-S-ACC dare-2-S Sosia-M-S-ACC be-INFIN say-INFIN REL-M-S-NOM I-S-NOM be-1-S
Do you dare say you are Sosia, when I'm the one who's Sosia?