YOU SAID:
I don't understand your carelessness toward that possibility
INTO JAPANESE
私はその可能性に対するあなたの不注意を理解していません
BACK INTO ENGLISH
I do not understand your carelessness against that possibility
INTO JAPANESE
私はその可能性に対するあなたの不注意を理解していません
BACK INTO ENGLISH
I do not understand your carelessness against that possibility
You've done this before, haven't you.