And here, for future reference, because short of a citation of the law, and probably even then, you won't quit spreading junk knowledge:
Better reference: https://www.law.cornell.edu/uscode/text/8/1184
b) Presumption of status; written waiver Every alien (other than a nonimmigrant described in subparagraph (L) or (V) of section 1101(a)(15) of this title, and other than a nonimmigrant described in any provision of section 1101(a)(15)(H)(i) of this title except subclause (b1) of such section) shall be presumed to be an immigrant until he establishes to the satisfaction of the consular officer, at the time of application for a visa, and the immigration officers, at the time of application for admission, that he is entitled to a nonimmigrant status under section 1101(a)(15) of this title.