What is another word for Tertium Quid?
Pronunciation: [tˈɜːti͡əm kwˈɪd] (IPA) 
Tertium quid is a Latin phrase that means something which does not belong to either of two things being considered. Some synonyms for this phrase include a third party, an outsider, a middleman, a mediator, a negotiator, an intermediary, an arbitrator, an adjudicator, and a go-between. These words suggest a person who can help resolve conflicts or differences between two parties. Tertium quid may also refer to a philosophical concept, and in this context, synonyms include a tertial being, an intermediary entity, a neutral substance, and a tertian substance. These words suggest a concept that is of fundamental interest in metaphysics and epistemology.
