noun
one theory; one opinion; another theory
Used to present a particular viewpoint, hypothesis, or interpretation, often when multiple explanations exist. Common in news, academic writing, and discussions.
一説によると、犯人はすでに国外に逃げたという。
According to one theory, the culprit has already fled abroad.
この事件の原
Regarding the cause of this incident, although it is just one opinion, human error has been pointed out.