YOU SAID:

Surely you are joking, Mr. Feynman

INTO JAPANESE

確かにあなたが冗談を言って、ファインマンさん

BACK INTO ENGLISH

Certainly say your joking, Mr. Feynman!

INTO JAPANESE

確かに、冗談で、ファインマンさんと言う!

BACK INTO ENGLISH

Indeed, say? c? c a joke!

INTO JAPANESE

確かと言うか。c?c 冗談!

BACK INTO ENGLISH

I say sure. c? c joke!

INTO JAPANESE

私は確かに言います。c?c 冗談!

BACK INTO ENGLISH

I say sure. c? c joke!