
The problem of abstract entities or objects is at the very heart of metaphysics, raising fundamental questions about existence and ontology.Some deny the very existence of abstract entities, others that there is a multitude of abstract entities. This book provides a thorough...

Think of a number, any number, or properties like fragility and humanity. These and other abstract entities are radically different from concrete entities like electrons and elbows. While concrete entities are located in space and time, have causes and effects, and are known...