adjective
â–¸ based on your own feelings and ideas and not on facts. Something that is based on facts is objective
▸ used about a person’s feelings and thoughts that no one else can know directly or completely

In other words subjective is not quantifiable by physical measurement or gage/meter. Scalar potential comes to mind as does Mind itself. We all know these non-things exist but they are yet to be quantified. But wait! Keely measured the power of a single thought. All one needs is the right equipment and know-how.