William Shakespeare of Avon had the equivalent 2nd grade education in 1500’s. We have actual documents that have survived that contain his signature, and he signed his name differently every single time. His children were illiterate. There are financial records showing him being a (fairly brutal) businessman. He left zero books or manuscripts to anyone in his will. He’s the only writer of note from the era where there is not even a shred of evidence of him ever writing professionally. Sure, physical evidence from 500 years ago can be scarce, but for every other famous writer of the day, you can at least find something, save Shakespeare. And you’re going to look me in the eye and try to tell me this uneducated, brutal peasant, who could barely sign his name, wrote some of the most eloquent, emotional works of fiction of all time? Yeah, I call bullish!t on that!