In some cases it is crystal clear, for instance in
my mother's nose
the nose clearly belongs to my mother.
In cases where the name is adjectival, it also makes sense not to use it.
But what is "enough" to qualify for ownership in that case ? What about the parking spot of your car ? Would you say
your car's parking spot ?
or
your car parking spot ?
and why ? In this old thread I saw a mention of
Indefinite names don't get possessive s.
I know such things as definite/indefinite articles, but I didn't know this principle transferred to nouns (does it even?). And in the previous example, I used "your car" where your is a possessive adjective, is it enough to know which car we are talking about in particular to qualify for a possessive even though we didn't use a definite article ?
Since "your car" is an inanimate object, can it even possess anything ?