Distinction refers to the recognition of difference between two similar things. In philosophy, distinction is a fundamental abstraction that involves recognizing differences between things). There are various ways in which things can be distinguished, such as logical or virtual distinction, which involves the mental apprehension of two definitions, but which cannot be realized outside the mind). A real distinction involves a level of ontological separation, as when squirrels are distinguished from llamas). In everyday language, distinction can also refer to the quality of being excellent or superior. It can also refer to a mark of recognition or honor, such as a degree with distinction or an accomplishment that sets one apart.