Original: ========= 下世話ですか？ ========= Improved: ========= 一般的な言葉ですか？（いっぱんてきなことばですか？） or 一般的な表現ですか？（いっぱんてきなひょうげんですか？） ========= Hello Holly-san, Don't worry about your Japanese! I can understand what you're trying to say! As Yusaku-san said, 強情を知る is not a common phrase and cannot be found in dictionaries and on the Internet. 強情を張る, which could be translated as "to insist/be obstinate/be stubborn," is a common phrase and can found both in dictionaries and on the Internet. However, this does not necessarily mean you cannot say, 強情を知る. If it's from a song you heard, it could mean "Someone realizes that he/she himself/herself is obstinate." In Japanese, we have this phrase 恥を知る, which literally means "to know shame." 強情を知る could be a variant of this phrase. I hope this helps a little.

聞いたことがありませんし、ググっても出てきません。 強情を張るのは違いではないでしょうか？ 強情とは、意地を張ってなかなか自分の意見を変えないこと。またそのさま。 例　強情を張る。　強情な性格 強情を張るとは、意見を変えないことです。

i don't know