同どう一いつ律りつ

noun

law of identity; principle of identity

In logic, the principle that a thing is the same as itself (A = A). Used in formal contexts.

• 同どう一いつ律りつは、論ろん理り学がくの基き本ほん的てきな原げん理りの一ひとつです。

  The law of identity is one of the fundamental principles of logic.