An untestable theory is one that cannot be proven true or false. For one reason or another the theory is beyond man’s current ability to investigate, and thus, it is disregarded until further developments in knowledge or technology make testing possible. To provide an example of such a theory, many people adamantly believe that ghosts exist. However, at this point in time, testing for supernatural entities is impossible, so such theories provide no purpose other than to relay one’s personal ideas about a phenomenon. With that in mind though, if researching a previously untestable theory eventually does become possible, then considering it would be worthwhile. For instance, at a point in history the idea that the Earth is round was an untestable
