The best evidence on this matter is the VMs itself, where we can interpret what the illustrations display. Though these points are relatively few, they are significant. Take the 'Cosmic Comparison' as an example with the VMs, BNF Fr. 565 and Harley 334. C-14 and provenance all are dated within 1400-1450. the second and third are from Paris. The VMs is strongly connected to 565 by the 43 undulations [VMs introduces ambiguity.] and secondly connected to 334 by the 'mermaid and her four companions'. Clearly there is a common knowledge and a shared structure, a cosmos from the dated era without planets, only found here. Then, there is so much more.
Does the forger have the right information?
Does the forger have the right information?