A form of syllogism in scholastic logic. The name is from a medieval mnemonic poem, where its vowels reflect the syllogism's standard form of AAA-1

All M are P. A - universal affirmative
All S are M. A - universal affirmative
Therefore, all S are P.  A - universal affirmative

Unlike some of the other mnemonic terms, barbara is a real Latin word ("barbarous things").

Barbara, Celarent, Darii, Ferio que prioris;
Cesare, Camestres, Festino, Baroko secundae;
, Darapti, Disamis, Datisi, Felapton,
Bokardo, Ferison, habet; Quarta in super addit
Bramantip, Camenes, Dimaris, Fesapo, Fresison