A lot of people readily believe any supposed grammar no-no they hear ... “The possessive form may be preceded by ‘of’ where one of several is implied.

A singular noun is a noun referring to just one person or thing, for example 'cat'. When you want to show that something belongs to that person or thing, you add a possessive apostrophe and an 's ...

The possessive will almost always be safe for pronouns and will probably work most of the time with nouns." The same ambivalence now governs the use of everyone or everybody with a referent pronoun.

ALL of us surely already know that in English, possession of something can be denoted by simply adding an apostrophe and an 's' to most singular nouns, as in 'the candidate's persona,' 'that woman's ...