{ 1 } - a picture (or model) of a possible fact (or state of affairs).
{ 2 } - part of a social "language game."
{ 3 } - meaningless unless it could be verified empirically.

A model represents a possible situation. It agrees with reality or fails to agree; it is correct or incorrect, true or false. In order to tell whether a model is true or false we must compare it with reality.

If we take this "picture" idea literally, we could make statements only about concrete physical situations -- and not about ethics or religion or philosophy. Then these latter areas couldn't be talked about; they'd go beyond what could be put into language.