Level 3 — The inference of a character that leaves a bony signature on the skeleton but is not present in either extant sister group to the taxon in question. For example, saying that ceratopsian dinosaurs such as "Triceratops horridus" had horns in life would be a level 3 inference. Neither extant crocodylians, nor extant birds have horns today, but the osteological evidence for horns in ceratopsians is without question. Thus a level 3 inference receives no support from the extant phylogenetic bracket, but can still be used with confidence based on the merits of the fossil data itself.