This is the 2993rd most frequent Korean word.
타당성
"타당성" means "validity" or "reasonableness" in English.
In this sentence, '타당성' is used to refer to the feasibility or appropriateness of the plan from an economic perspective.
그 계획은 경제적 타당성이 없다.
That plan lacks economic feasibility.
Here, '타당성' is applied to assess the logical validity of an argument, showing its relevance and soundness.
그의 주장에는 논리적 타당성이 있어 모두가 동의했다.
His argument has logical validity, and everyone agreed.
'타당성' in this example evaluates the appropriateness of the project in terms of its environmental impact.