Wikipedia:Articles for deletion/30-point rule
This doesn't seem to be an idea actually used in psychology, and it fails the  standard of being wiki-notable pseudoscience. The first source is an interview with Christopher Langan on a random website for day-trading hobbyists; we'd really have to stretch to call that |reliable. The third is self-published, as the nominator pointed out. The one in the middle is the closest to decent: it's a blog post by a subject-matter expert hosted by a publication with at least ''some'' standards. It also indicates that the topic is nonsense. The article currently says {{tq|This theory is usually attributed to psychologist Leta Stetter Hollingworth}}. The blog post says: {{tq|As far as I can tell, the idea of the 2 standard deviation IQ communication range did not start with Leta Hollingworth. Hollingworth (1886 – 1939) was a pioneering psychologist who did conduct research on high IQ individuals and published extensively on the topic; however, she never used the term ‘communication range’ nor explicitly discussed such an idea.}} Instead, the term was coined by some guy writing in the magazine of a high-IQ society. {{tq|Hollingworth was writing specifically about leadership, and in childen, but Towers extrapolates the point to claim that any kind of ‘genuine’ communication is impossible across a 30 IQ point gap. ... The reference to specific numbers (“+/- 2 standard deviations, 30 points”) gives the illusion of scientific precision, but these numbers were plucked from the air.}} Wikipedia is not the place for things made up one day in an attempt to blame other people for one's own failures of communication
— User:XOR, 18:22, 26 July 2021 (UTC)
Stance: delete
Cited policy: WP:FRINGE||WP:RS (Wikipedia:Fringe theories)