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?
That didn't even make that much sense in English.