FOR ALL YOU, I, THEY, ETC. KNOW


Meaning of FOR ALL YOU, I, THEY, ETC. KNOW in English

( informal ) used to emphasize that you do not know sth and that it is not important to you :

She could be dead for all I know.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.