ph.
it is impossible to know
Oxford Dictionary
ph.
— is worth considering; there is some truth in —
Oxford Dictionary
Oxford American Dictionary
ph.
used to convey the impossibility of knowing what has happened or will happen
Oxford Dictionary
ph.
used to convey the impossibility of knowing what has happened or will happen
Oxford American Dictionary
ph.
there is nothing similar to or as good as
Oxford Dictionary
Oxford Dictionary
ph.
it is impossible not to recognize someone or something
Oxford Dictionary