YOU SAID:
You really are the dumbest smart person I’ve ever met
INTO JAPANESE
あなたは本当に私が今まで会った中で最も愚かな賢い人です
BACK INTO ENGLISH
You really are the stupidest and smartest person I have ever met
INTO JAPANESE
あなたは本当に私が今まで会った中で最も愚かで賢い人です
BACK INTO ENGLISH
You really are the stupidest and smartest person I have ever met
That didn't even make that much sense in English.