Although not properly elves, half-elves are typically considered as such by humans because of elven ancestry they possess. Half-elves, categorically, have at least half elf in their blood; meaning that half-elves that breed back with elves are always considered half-elven, regardless of how long ago the non-elf blood was introduced. On the other hand, half-elves who do not breed with elves (thus diluting the elven strain even further) are considered by elves to be totally non-elven. These crosses typically have none of the abilities normally associated with either elves or half-elves.
Some half-elves are not readily accepted in either elf or human communities, and they often become introverted, sullen, and embittered. Lucky half-elves gain access to both races, for often elves and humans find half-elves fascinating. Largely, it is a matter of the half-elf in question and the societies with which he or she deals. Half-elves are never accepted in grey elf society, for half-elves serve as a palpable reminder of all that the grey elves wish to eradicate.