What's the difference between "WHAT'S THE POINT IN" and "WHAT'S THE POINT OF"

What's the difference between "WHAT'S THE POINT IN" and "WHAT'S THE POINT OF"

There's been a question yesterday about what the difference between "WHAT'S THE POINT IN" and "WHAT'S THE POINT OF" is, so I will write a few pointers to set things straight:

- First of all, it isn't just "WHAT'S THE POINT IN/OF", there's "WHAT'S THE POINT TO", too.

- Here's a few examples:

(a) There's no point in talking.

(b) Is there a point to her action?

(c) What's the point of that sculpture's being there?

- Here's some explanations:
Firstly, there is no rules for this.
However, these are idiomatic norms/formulas.

- Look closer and more carefully, you will notice that:
"Point in" is used next to gerunds (verb+ing). This idiom is mostly used in exams.
"Point to" is used next to a noun.
"Point of" is used next to noun phrases.


Please note that there are many other opinions as well, so don't take it too seriously.