 Next consider the specific name “Socrates”. It refers to a certain Athenian, and, in contrast to the generic case, this (unitary) extension may be delimited concisely without appeal to its onomastic features. Moreover, just like “bachelor”, “Socrates” appears in (some) dictionaries along with an explanation supplying just this sort of non-linguistic identifying information. The following is from Lexico (see the link in Other Internet Resources):