You stupid troll.
It was science which discovered that it was a photographic negative.
And, since the technology did not exist back then even for that — let alone the induction of the Maillard reaction, let alone the intensity of the image corresponding to depth — that is further evidence against its being a forgery.
BTW, I noticed you’ve now retreated from your “random smears” argument.
Troll.
So did photography exist back then or not?