syl ‧ lo ‧ gis ‧ m /ˈsɪlədʒɪz ə m/ BrE AmE noun [countable] technical
[ Date: 1300-1400 ; Language: Old French ; Origin: silogisme , from Latin , from Greek syllogismos , from syllogizesthai 'to argue by syllogisms' , from syn- ( ⇨ ↑ syn- ) + logizesthai 'to calculate' ]
a statement with three parts, the first two of which prove that the third part is true, for example ‘all men will die, Socrates is a man, therefore Socrates will die’
—syllogistic /ˌsɪləˈdʒɪstɪk◂/ adjective