stop the conversations even into the future by other people

[GoldfishLord]

"All there is to know." = The total of all knowledge about something or someone
"All there is to say." = The total of all possible comments about something or someone

Can you (meaning any person) ever possess all knowledge or predict all possible comments (which are uttered, said) and stop the conversations even into the future by other people?

Of course not.

You can never know all, about the moon, this, that, or anything you can imagine.
You can never say all, about the moon, this, that, or anything you can imagine.

Q.You can never say what?

A. You can never say all there is to say about anything!

You would be delusional to think otherwise.

Does that help?

(Reference: https://forum.wordreference.com/thr...y-all-there-is-to-say-about-anything.3047424/ )
(I didn't start that thread)

I'd be most grateful if you'd let me know the meaning and grammatical construction of the red part.

 

[Tarheel]

It's hard to say. I would have to ask that person what was intended by those words.

Just because I am a native speaker of English that doesn't mean I always understand what somebody is saying. (I'm sure everybody can say that.)

 

[GoldfishLord]

He is inactive.

 

[Tarheel]

Okay, I'll take a stab at it. Perhaps:
.
You can't ever be sure that everything that could be said has been said. Somebody might think of something -- if not today then tomorrow or the next day.

 

[jutfrank]

The red part is the end of the question. The word stop is a main verb.

Can you ... stop the conversations ... by other people?

Does that answer your question?

 

[GoldfishLord]

Does that answer your question?

I'm not sure what "even into the future" means, and why "into" is being used instead of the preposition "in".

 

[jutfrank]

I'm not sure what "even into the future" means, and why "into" is being used instead of the preposition "in".

The writer is talking about all possible conversations, including conversations in the future.

Don't worry about this. The thought is not very well expressed, in my opinion. The writer is just trying to say that you can't ever know everything, that's all.