It depends on your definition of "liberal arts". The classical liberal arts (i.e. arts of a liberated person, as opposed to the servile arts) are music, arithmetic, geometry, astronomy, grammar, logic, and rhetoric. So if you boil down computer science to its mathematical principles, you could make a decent case for it.
These days, the liberal arts generally relate to the humanities: language (e.g. English degree in the USA), fine arts, history, anthropology, sociology, philosophy, etc. It's the study of people and groups of people, instead of the physical world and the laws that operate on the physical world independently of the people that occupy it.
These days, the liberal arts generally relate to the humanities: language (e.g. English degree in the USA), fine arts, history, anthropology, sociology, philosophy, etc. It's the study of people and groups of people, instead of the physical world and the laws that operate on the physical world independently of the people that occupy it.