For a test of open-mindedness, see Essay:Quantifying
Openmindedness. Saying someone lacks an open mind is often used
pejoratively, for example, "Don't be pro-life/pro-marriage/pro-
abstinence, be open-minded. In this context, "open minded"
simply means considering a certain viewpoint. - "It is the mark
of an educated mind to be able to entertain a thought without
accepting it." (Aristotle)