I realized what silly-things I did: that's no difference to pull the tiger's teeth from his mouth because Xixabangma really seems to be somewhat "top-importance" in some western peoples' eyes.  
 :#: However, before evaluate the rationality of “not well-known” argument, I want to ask hike395 about his "WP:PLACE defines widely accepted in a relative way (i.e., 3x more common than the alternatives)" - where was that exactly in WP:PLACE?