必要 ひつよう じゅう ぷん条件 じょうけんでしょう
hitsuyōjū pun jōkendeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 必要十分条件

1. Sufficient condition, likely.; Probably sufficient.

Polite
Presumptive
Conjecture