人間を優等と劣等に分ける考え方は危険だ。
The idea of dividing people into the superior and the inferior is dangerous.
彼は幼いころから、自分は兄より劣等だと思い込んでいた。
Ever since he was little, he had been convinced that he was inferior to his older brother.
一度劣等の烙印を押された生徒は、次第にやる気を失っていった。
Once branded as inferior, the students gradually lost their motivation.