I'm sorry can you be a little more precise here? What is the question or point of contention? IS there an example or a thread you can post or link to?
I think this came up in one of the threads regarding what exactly an effect is when referenced by other cards. Other confusions arise because the term effect is overloaded. Sometimes it refers directly to a triggered effect by an opponent. Sometimes it's the effect of struggle resolution, other times it's a story card effect. Which of these are actionable, which are just vague grammer, etc.
Some possible examples:
"Dark Quagmire cannot be chosen as the only target of a triggered effect. At the beginning of each player's story phase, that player must remove one of his success tokens from attached story." Would this make it immune to Repo Man? (Especially relevant given the wording on Chess Prodigy about passive effects based on a trigger)
Combine, Dark Quagmire, Guardian of the Key, and the story card that all players name a character or support card and you destroy all copies of that card. "Disrupt: Exhaust Guardian of the Key to cancel 1 effect that chooses a support card as a target." So, there are card effects, story effects, etc. Does "effect" wrap "card effect" and "story card effect"?
Also, in this situation, is winning the story a "triggered effect"? It certainly seems like it has a triggering condition of winning the story, but perhaps that's not a trigger. If 'trigger' is only *EVER* for the bolded Action, Response, Etc, then that removes most of the issue there, but we should fix the Chess Prodigy.
Here's a fun question... Say somehow that the aforementioned story ends up being won, but through some combination of events, the only thing left in play is the Dark Quagmire card. Can it be the target of that story card's effect? What if both people choose it?
Here's more for the what is an effect quetion: "After an opponent wins a story but chooses not to trigger its effect, exhaust Field Researcher to trigger that story's effect as if you had won the story.(It still goes to the winning opponent's won story pile.)" This seems to imply that a story card's text is a triggered effect since the opponent must "choose not to trigger its effect" for Field Researcher's text to apply.
And this one: "Action: Trigger a non-conspiracy story card in your won story pile. Shuffle it back into the story deck before its effect resolves." Clearly the first part (the Action) can be canceled, but what about the story re-resolution? It's been triggered?
And another for "what is an effect": "If your opponent has put a character into play due to a card effect this turn, reduce the cost to play Intervention by 2." So, let's say we have enough cost reduction on the table to lower the cost of playing a card to zero (that Miskatonic dude that lowers the cost of investigators can do it). I can now play this card, for 0 cost. Was i putting this character into play due to a card effect (i.e. the cost lower)? It becomes more relevant when considered with Stalking Hound: "After an opponent's character enters play due to a triggered effect, put Stalking Hound into play from your hand or discard pile." This seems to imply that there are card effects that put characters into play that are not triggered effects.
"Disrupt: Exhaust Underground Asylum and pay 1 to cancel an effect that would cause a character to go insane." Combat struggles? How about Zann's ability? "If you win a (T) struggle in which Erich Zann is participating, instead of the normal struggle effects, you choose which of your opponent's participating characters goes insane." If the opponent uses Zann's ability, is this now the effect that can be cancelled? (Probably not in this last case since Zann's ability is passive)
Anyway, I think this shows some of the possible confusion about what exactly an effect is, especially when combined with the word 'trigger' that happens a lot.