If you get this far, please note that the previous essay is just introducing a word. I am not claiming to have invented the idea that a photo has meaning. Also, I have not read Camera Lucida, but only because it is a turgid, unreadable, mess, which is why you almost certainly haven't read it either, hero. And no, we don't already have a word for this thing, if you think you've got a candidate, feel free to contact me, and I will cheerfully explain to you why your word is too broad, too narrow, or simply not on target at all.
But you know, I don't really need to. Several of the wanna-bee philosopher types on PP have exclaimed "Pfft! We already have a word for this!" and they have offered, as of this writing, five different words, all with different meanings which I think illustrates the problem better than I ever could.
That is all.
ETA: we're up to 11 proposed words with 11 different definitions.