

None of these appeals to relative complexity, low level structure, or training corpuses relates to whether a human or NN “know” the meaning of a word in some special way. A lot of your description of what “know” means could be confused to be a description of how Word2Vec encodes words. This just indicates ignorance of how ML language processing works. It’s not remotely on the same level as a human brain, but your view on how things work and what its failings are is just wrong.
They don’t seem to actually identify the cookies as tracking (as opposed to just identifying that the account can bypass further challenges), just assuming that any third party cookie has a monetary tracking value.
It also appears to be unreviewed and unpublished a few years later. Just being in paper format and up on arXiv doesn’t mean that the contents are reliable science.