古こ説せつ

noun

ancient belief; old theory; traditional view

Refers to a belief, theory, or interpretation from ancient times, often contrasted with modern scholarship. Common in academic or historical contexts.

• この古こ説せつは、近きん年ねんの研けん究きゅうによって否ひ定ていされた。

  This old theory has been disproved by recent research.

• 彼かれは日本にほん神しん話わに関かんする古こ説せつをまとめた本ほんを出しゅっ版ぱんした。

  He published a book compiling ancient beliefs about Japanese mythology.