“Conjecture as a fact.” That’s a new one. Stay lonesome as you have a lot to learn. Try semantics first.
I don’t get your point. The headlines does, in fact, state a conjecture as a fact. That’s to make the story more interesting and attract clicks. When I read the headline, I assumed (incorrectly) that the attribution was due to spectral analysis, measurements of the spectrum of reflected light, or something similarly exotic. But it was based on dynamical evidence. Objects in such an orbit are short lived in astronomical timeframes, so it must only be a few million years old. There is hardly anyplace other than the moon that it could have come from.