first principle

A basic, foundational proposition or assumption that cannot be deduced from any other proposition or assumption.

Japanese Meaning

基本原理 / 第一原理 / 根本原則

By returning to the first principle, the scientist questioned every assumption in the model.

第一原理に立ち返ることで、その科学者はモデルのあらゆる仮定を疑問視した。

Sense（1）

A basic, foundational proposition or assumption that cannot be deduced from any other proposition or assumption.

first principles

（ plural ）