The phrase "a decent possibility" is correct and usable in written English.
You can use it when discussing the likelihood or chance of something happening, often in a casual or informal context.
Example: "Given the current circumstances, there is a decent possibility that we will finish the project ahead of schedule."
Alternatives: "a fair chance" or "a reasonable likelihood."
O.K., not that story, maybe, but something like it that had at least a decent possibility of being true.
But there's always a decent possibility that the negotiations between the White House and the Republicans will collapse.
"There seems to be at least a decent possibility that this will be a system that can be used elsewhere," Mr. Page said last June.
The film with arguably the greatest title ever was another one that looked a decent possibility for Cannes, being the latest from eccentric Swedish auteur Roy Andersson.
The Pietersen case is less clearcut, but after all the positive noises that have been coming out of his camp and the England and Wales Cricket Board over the past couple of weeks, there must be a decent possibility of a new deal being announced over the weekend.
Again, we're really on the tip of the spear here, but there's a decent possibility that we're going to see a substantial uptick in Android AR during the life of the phone.
In the meantime, if you can get your trades through, there is likely a decent arbitrage possibility at play, though trading lag times could make any such activity incredibly risky.
Nonetheless, it sounds as if an answer to the question of our origin admits of only two decent possibilities: God did it, or the multiverse did it.
What could be next is not quite anyone's guess, but there are certainly plenty of decent possibilities and without trying to sound clichéd, that does mean the future likely holds some fantastic discoveries.
Your present a decent selection of possibilities for why this is so, including the general public being aloof to this war.
