philosophy of science
... that distinguishing science from non-science is an unsolved problem in the philosophy of science, so an "I know it when I see it" standard is sometimes used to recognize pseudoscience?
... that distinguishing science from non-science is an unsolved problem in the <b id="mwB4E"><a href="./Philosophy_of_science" id="mwB4I" rel="mw:WikiLink" title="Philosophy of science">philosophy of science</a></b>, so an "<a href="./I_know_it_when_I_see_it" id="mwB4M" rel="mw:WikiLink" title="I know it when I see it">I know it when I see it</a>" standard is sometimes used to recognize <a href="./Pseudoscience" id="mwB4Q" rel="mw:WikiLink" title="Pseudoscience">pseudoscience</a>?