Recently a user posted a "puzzle" about a specific equation. I tried my best to come up with a solution that objectively solves both parts (which is mathematically sound as far as I can tell), but the OP keeps insisting that it is not their intended solution. Without accepting my solution or refuting it in any reasonable way, they reposted the puzzle, claiming "it caused a lot of misunderstanding". The same is happening now with Bass's answer.
While the posts have multiple issues, I'm seriously annoyed by the single fact that the OP's intended solution is mathematically WRONG. How can we deal with it? Is such a question even on-topic on PSE, ignoring all the other issues the linked posts have?