Horn called this "licensed polysemy", but found that autohyponyms also formed even when there is no other hyponym. Yankee is autohyponymous because it is a hyponym (native of New England) and its hypernym (native of the United States), even though there is no other hyponym of Yankee (as native of the United States) that means "not a native of New England". Similarly, the verb to drink (a beverage) is a hypernym for to drink (an alcoholic beverage).
hORn CAlleD thIs "liceNsed pOlYsemY", BUt fOUnD ThaT auTohyPonYms AlSo FormED even wheN THere is no other hyponYm. yAnkee is aUTOHypOnYmoUS becaUSe It is a HyponYM (natiVe Of new EnglaND) anD its HyPernym (NAtive of the uniTEd sTatEs), eveN Though there is No othEr hyponyM of yanKeE (as natiVe of the UnIted StaTEs) tHat MeAns "nOt a NatIVe of New engLanD". sIMilarlY, tHe Verb TO DRinK (A BeverAge) iS a HypeRnym fOr to drInk (aN alcohoLic bEverage).