YOU SAID:
I thought I was wrong, but I was mistaken.
INTO JAPANESE
私は間違っていると思っていましたが、間違っていました。
BACK INTO ENGLISH
I thought I was wrong, but I was wrong.
INTO JAPANESE
私は間違っていると思っていましたが、間違っていました。
BACK INTO ENGLISH
I thought I was wrong, but I was wrong.
That didn't even make that much sense in English.