"
The term is ""quotation marks"" and use is dictated by manuals of style, not by your ""knowing"" what ""quote marks"" must be used for.   The use of quotation marks around ""know"" is thus proper and correct.   What I believe to be proper in an article is material found in reliable sources which means the Guardian and NYT meet that requirement of WP:V.  Thank you most kindly.   "