probability, general truth or simple future tense?

[Klpno]

Hello everyone,

Even though many juvenile delinquents will have troubled family relationships, a significant number of them have family who will want to keep contact with them while they are serving their sentence. These family members can be a positive influence in changing the juvenile’s behaviour and in preventing future offending

According to the Oxford dictionary:

http://oald8.oxfordlearnersdictionaries.com/dictionary/will_1

5 used for stating what you think is probably true

That'll be the doctor now.
You'll have had dinner already, I suppose.

6 used for stating what is generally true

If it's made of wood it will float.
Engines won't run without lubricants.

In the excerpt above what does "will" express: probability, general truth or simple future tense?

Thank you.

[Dozy]

This seems tricky to explain precisely, and it wouldn't surprise me at all if you got different answers from different people. To me, it is stating a general truth but through the medium of the speaker's belief/expectation. So, it is more objective and factual than "I think", "I suppose, "probably", "in my view" and all those kinds of things, but less so than the version without "will". There is also a sense of "If you investigate these people you will find that..."

[Klpno]

Thank you, Dozy.