There is a certain kind of phrase that can be the subject of a sentence. This is a definite description. Generally, descriptions have the form: the thing satisfying such and such a condition. ‘Descriptions and existence: did the Greeks worship Zeus?’ examines definite descriptions, how they can be combined with predicates to make whole sentences, and examples of how logic can be used. Descriptions are names, not quantifiers, as they usually refer to objects. However, descriptions are a special kind of name. Unlike proper names like ‘Annika’ or ‘the Big Bang’, they carry information about the object referred to and are often central to important arguments in mathematics and physics.