That chart implies it is possible for somebody to write a work that wins the Hugo awards for best novelette and best novella, which I’d really like to see happen!
Now you’ve just shifted the problem to a much harder statement: proving the things the NN recognizes as a rose is actually a rose.
You cannot get rid of the enviroment, and the best thing you can do is be explicit in what you rely on. For example, formally verified operating systems often rely on hardware correctness, even though the errata sheets for modern CPUs are hundreds of pages long.
There are even cases where it is context-depedent: Maße (measurements) and Masse (mass). Both are written MASSE uppercased, but how do you know which one's which?
For additional fun: Swiss German doesn't use ß at all, so there is no difference between "in Maßen genießen" (to enjoy in moderation) and "in Massen genießen" (to enjoy in large amounts).