The Trivium is a systematic method of critical thinking used to derive factual certainty from information perceived with the traditional five senses: sight, sound, taste, touch, and smell. In the medieval university, the trivium was the lower division of the seven liberal arts, and comprised grammar, logic, and rhetoric(input, process and output).

Etymologically, the Latin word trivium means "the place where three roads meet" (tri + via); hence, the subjects of the trivium are the foundation for the quadrivium, the upper division of the medieval education in theliberal arts, which comprised Arithmetic(number), Geometry (number in space), Music(number in time), and Astronomy (number in space and time). Educationally, the trivium and the quadrivium imparted to the student the seven liberal arts of Classical antiquity.

منبع: ویکی پدیا