Most wrong specifications about a new model are not invented. They are inherited — from a neighbouring product's spec sheet, from a pre-release page nobody updated, or from a vendor document that contradicts another vendor document. The error is usually traceable, and tracing it is more useful than correcting it, because the same path produces the next error too.
These notes work through three specific cases in Alibaba's Wan 3.0 documentation: two places where the vendor contradicts itself, one widely repeated figure traced back to the product it actually belongs to, and the citation format that would have caught all three.
The awkward case in specification sourcing is not a third party getting it wrong. It is the vendor publishing two documents that disagree, because then "check the official source"
A large number of pages ranking for Wan 3.0 list a 4K output tier. The model does not have one. Its resolutions are 480P, 720P and 1080P, and 1080P is the ceiling.
Model documentation is revised silently. Parameters are added, defaults change, preview notices are removed, and there is usually no changelog. So a specification claim that says o