The Modern Forgery Hypothesis

[Jorge_Stolfi]

You must also explain the required resources needed for this forgery and the strange counter motive choices made. He would need a master callirapher, but then choose an artist with Picasso levels of creativity and instruct them to illustrate like a gradeshcooler.

I do not think that the Modern Forgery theory is likely, for various reasons.  However, skillfully forged medieval manuscripts are a thing.  

These are some examples, cited by Google:

  Famous Modern Forgeries

• The Spanish Forger (active c. 1900): One of the most successful forgers in history, this anonymous artist created over 200 "medieval" miniatures. He typically painted on genuine 15th or 16th-century parchment from which he had scraped original text. His works were eventually unmasked using neutron activation analysis and Raman microscopy, which revealed modern synthetic pigments like Paris Green and chrome yellow.
  
• The Vinland Map: Acquired by Yale in the 1960s as a 15th-century map depicting Viking settlements in North America, it was definitively proven in 2021 to be a 20th-century forgery. Scientific analysis identified that the map was drawn with inks containing titanium, which only became available in the 1920s.
  
• Constantine Simonides (1820–1867): A prolific Greek calligrapher who forged numerous "ancient" documents, including Greek papyrus rolls and Byzantine imperial decrees. [...]
  
• The Czech Manuscripts: The "Queen's Court" and "Green Mountain" manuscripts, "discovered" in 1817 and 1818, were forgeries intended to bolster Czech national mythology. They were accepted as authentic for nearly 70 years before being debunked.
  

All the best, --stolfi