確かにそう言った

definitely said that

→ 確かに
phrase Rare #39,703
definitely said that Used to firmly confirm that someone said something. The subject is often omitted and understood from context, so it can mean “I definitely said that” or “he/she definitely said that.”
JA: 彼女は確かにそう言ったけど、今は考えが変わった。
EN: She definitely said that, but she has changed her mind now.

確かにそう言っただろ

I did say that, didn't I?

— ブレット・トレイン (2022)

彼は確かにそう言った

He definitely said that.

確かにそう言ったし確かに聞いた

I definitely said that, and I definitely heard it.