The nature of Fi

[FDG]

I suppose, if you don't like somebody you don't greet him/her, and vice versa.

That's only true when that's what you expect. It's illogical and silly though, but I acknowledge that it's a reality.

Sorry, what do you mean? Why is it illogical not to be warm to somebody you dislike?

I wanted to clarify that it's not a double implication so if you're not warm it doesn't mean you dislike, but if you dislike you will not be warm.

You didn't say "be warm", you said "greet". Of course being cold to someone shows either dislike or indifference, but not greeting someone doesn't necessarily mean anything.

Depends on the situation, probably.