So the competing narratives can be harmonized.
We say the drone was shot down over international waters. That's probably true.
Iran says that the drone had violated its airspace. That's probably true, too.
Stealthish drone crosses border to get intel, then scoots back. SAM launches at some point - maybe while in Iranian airspace, maybe not - but doesn't catch up until international airspace.
Both can be true, for as far as they go.
We say the drone was shot down over international waters. That's probably true.
Iran says that the drone had violated its airspace. That's probably true, too.
Stealthish drone crosses border to get intel, then scoots back. SAM launches at some point - maybe while in Iranian airspace, maybe not - but doesn't catch up until international airspace.
Both can be true, for as far as they go.