 POV&quot;, a topic that is of considerable interest to me,
    as one of the aims of my own inquiry is to look into the question:
    What is the geometry of spaces whose points are views?

SS: ... it seems to me that POVs are distinct from the generalized triad, O-S-I, ...

JA: I do not know why I have to keep explaining that I do not use
    this form of language about &quot;triads&quot; to mean any thing other
    than a single 3-tuple of the form &lt;o, s, i&gt;, which is only
    a single element of a