Questioning the outcome of a single action has almost nothing to do with overall trigger knowledge.
What a bore! 
Of course, you're right,
"nothing to do with overall trigger knowledge"!..

Actually, I changed my mind about it. I think Victory is only given to the players that run the trigger, and not even their allies.
Closer, closer...
This topic is just a forum game IMO.
Some kind of, but not quite... It is not
just a forum game.
Alright, about 20 people have already voted and I can tell now.
The real reason I made this topic was my personal discovery

concerning victory and defeat actions.
Initially I wanted to make a topic in the UMS Ideas forum, but then decided to diversify life and made it a poll.

The catch is that there is no exhaustively full answer provided in the poll. The closest answer in the poll is the first one: "Player P receives victory. All other players receive defeat." My congrats to anyone who chosen it! You can take a flower

The closest answer among participants was provided by Kaias:
As I understand it, when a victory action is found it finishes that loop of triggers and ends the game. Any player who doesn't run the victory action in that loop gets a defeat.
Kaias, take two flowers

I myself for a very long time was totally convinced it is "Player P and all his true allies receive victory. All other players receive defeat." (BTW, as the poll shows for now this is the most popular answer among mapmakers.) But the really right answer is four: "Your variant... (Post in the topic.)" I won't either provide fully exhaustive answer, because it is very time-consuming to list everything clearly, but I tell you things that amazed me.
The first thing 
is that victory (and also draw) does not finish the game after the current trigger loop finishes (though, defeat finishes the game immediately). If there are hyper triggers SC actually runs the next trigger loop, and will continue when the victory action executed again. So, the trigger
TRIGGER
OWNERS: Player 1
CONDITIONS:
ACTIONS:
End scenario in victory for current player.
Preserve trigger.
won't finish the game for player 1. I'll leave for you to find all the nuances and consequences this behavior causes.
The second thing 
is that, as Kaias truly stated, (I'll rephrase his statement into the true one) any player who runs the victory action in that very loop gets a victory too. The most interesting part is that any player who runs the draw action in that very loop gets a draw; all other players get a defeat! Immediately a little correction: in case the player runs both a draw action and a defeat action, only the latter counts (though victory interrupts both the draw and the defeat, whenever it was executed earlier or later).
Now, please tell me this everything was already known ages ago! I don't care. This was
just a personal discovery.
Thanks.
Some.