I'd love to hear about it. Please E-mail a response. By Dr. Joseph B. Strauss Science acknowledges both entities and non-entities. However, it's attention is always directed toward the entity. Let's look at some examples.
Heat is an entity.
It can be created by building a fire or burning some fossil fuel or gaseous substance. It can be measured in BTU's or calories. Cold, on the other hand, is merely the absence of heat. You cannot create cold. It merely is what exists when heat is withdrawn.