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What’s really gonna bake your noodle is when you look at the facial napkin in Spain...because the blood patterns match up to the Shroud, have the same rare pollen and the blood type is also rare AB.
And the provenance of the napkin is a lot better than the shroud
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Yep. AB+ is a very rare blood type, and not at all common in the regions where it could be claimed to have been manufactured (think single digits %):
https://en.wikipedia.org/wiki/Blood_type_distribution_by_country
Blood type wasn't discovered until 1901. So what are the odds that multiple artifacts/occurrences (shroud, sudarium, eucharistic miracles) would all have the SAME rare blood type when they all PRECEDE knowledge of such a thing? That alone bears answering.
The imagery of the shroud would have to have been made on a 3D "mold". It has 3 dimensional depth which, when combined with the other factors is a compelling argument.
Some examples of the various arguments (blood type, pollens, weaving pattern, cloth type, imagery, etc.) are here: https://blog.magiscenter.com/blog/facts-about-shroud-turin
For someone, or even a group, to get ALL this right in a single object is mind bogglingly improbable. And then to have it share features of blood stain placement, etc., with another separately produced item with a different history of coming to Europe and have them be called fakes is... well, just bonkers from any logical perspective.
In the face of such evidence, I would think it wouldn't be easy to reproduce exactly with middle age technology. If it's fake, why haven't they been replicated with ALL the features and facts? Why wouldn't we see other examples of this technology in other historical objects? Why wouldn't we have writings detailing at least something about methods which *could* produce such an image and other factors?
It's either exactly what it's claimed to be, or, without historical evidence of the ability to make such an object, it's essentially an archaeological OOPArt since it cannot have come from middle ages technology and methods of art production.