Premise: Mammals are any vertebrates within the class Mammalia ( [ məˈmeɪli.ə ] from Latin mamma #Latin `` breast '' ) , a clade of endothermic amniotes distinguished from reptiles ( including birds ) by the possession of a neocortex ( a region of the brain ) , hair , three middle ear bones and mammary glands . The mammals represent the only living Synapsida , which together with the Sauropsida form the Amniota clade .
Hypothesis: Mammals are a clade.
Label: ENTAILMENT