Wikipedia:Articles for deletion/Baader-Meinhof phenomenon (4th nomination)
based strictly on the nominator's  and  grounds for deletion (listed in the 3rd nomination). I found five reliable-source books that mention the term. All are minor/trivial coverage of the topic (two are in fictional novels), but I think they invalidate the  basis for the third nomination, and validate
— User:Safiel, NONE
Stance: keep
Cited policy: WP:ONEDAY||WP:OR||WP:ONEDAY (Wikipedia:Wikipedia is not for things made up one day)