noun
other theories; alternative views
Used in academic or formal contexts to refer to theories or opinions different from the one under discussion. Often contrasted with 自説 (one's own theory).
彼は自説を主張するだけでなく、他説にも耳を傾けた。
He not only asserted his own theory but also listened to other theories.
論文では他説を批判的に検討する必要がある。
In a paper, it is necessary to critically examine alternative views.