YOU SAID:

Surely you must be joking

INTO JAPANESE

確かに冗談だろ

BACK INTO ENGLISH

Surely joking, right?

INTO JAPANESE

確かに、ホントですか。

BACK INTO ENGLISH

Indeed, it is the truth?

INTO JAPANESE

確かに、それは真実ですか。

BACK INTO ENGLISH

Indeed, it is the truth?