妄ぼう説せつ

noun

fallacy; false report

A formal or literary term for a baseless claim, erroneous argument, or false rumor. Often used in critical or academic contexts.

• その説せつは妄ぼう説せつに過すぎないと学がく者しゃたちは一いっ蹴しゅうした。

  Scholars dismissed the theory as nothing more than a fallacy.

• 新しん聞ぶんに載のった話はなしは全まったくの妄ぼう説せつだった。

  The story in the newspaper was a complete false report.