This thread is intended to replace the previous thread that I established (and was closed), because the img link was inadvertently corrupted. I was hoping to generate interest among the mentors (and the more prominent contributors to this subject) in preparing something like a Fact Sheet or FAQ clarifying the elements of Special Relativity Theory. PAllen and Fredrik have made very useful contributions to the subject and have identified the root source of the problem we have had in the past in discussing foundational issues of special relativity. They have pointed out that some of us have been operating on different basic conceptions of what elements of Einstein’s SR discussions actually constitute The Theory of Special Relativity as it is should be understood. Perhaps an august team representing the PF stance on this subject could develop a summary of the situation in order to avoid future confusion of the type that has precipitated the kinds of misguided discussions that have taken place in the past. The diagram below is not offered as a form to be adapted—it is intended merely as a stimulus to motivate a team of seasoned PF mentors and established authoritative PF contributors to come up with some sort of presentation that clarifies the relationships among the various theories and interpretations.