Wlcome to the RPG Codex
Misconnected! I see you are arguing with Volourn, so you must be new here.
Sadly not new, just foolish it seems. I'm not actually sure how long I've been haunting the Codex, but at least a few years. Long enough to see Volourn make a perfectly good argument. But I suppose also long enough not to expect to ever see it again.
Skills like eprsuausion are to be used more in situations where it is a random PC that the DM hasn't fully fleshed out.
Or hey, maybe social skills - and skills in general - are tools for resolving events that have multiple possible outcomes. You make it sound as if skill checks can only resolve as "I win, with magic cherry on top" or "I fail so hard the sheer shock of it makes me trip and fall on my sword". More commonly, especially when it comes to social skills, they resolve the magnitude of success (or failure).
Regardless, let's pretend you're right for a moment and instead figure out why you are right, and how it relates to social skills in Project Eternity. Care to offer your insights?
While you're mulling over the answer, you may want to keep in mind that you probably don't want to accidentally argue that social skills shouldn't exist at all in PE, and that all actors, PCs and NPCs alike, should only ever act within the framework of the fiction. Yes, yes, I'm stating the blindingly obvious, but consider it in the context of event resolution mechanics; because actors can't (or at least shouldn't) act outside the framework of the fiction, event resolution mechanics cannot be used to define outcomes that fall outside the framework of the fiction.
You can't use a social skill to achieve an outcome the GM hasn't at least implicitly ruled on in a traditional RPG, because the GM in traditional RPGs has narrative control. Your PC doesn't get to decide what he can achieve by using a skill, and anything the RAW says only goes as long as the GM does not say otherwise. If the GM asks your sucker PC to roll a commerce check while axe-shopping, you don't get to decide what the possible outcomes of the check are.
Read the skill descriptions. Read the damn manual in how it is supposed to work.
You know what, if you can point me to the damn manual that explains how skills are supposed to work in all of TTRPG-dom, or hell, just in traditional TTRPG-dom, I'll oblige you. I'll even read it twice.
I did read a core rules book the other day. Not D&D, mind, but Dark Heresy. A 40K adaptation of the WFRP2e system. In it you have something called Talents, which are much like Traits in D&D3e. One of those Talents is called Chem Geld. In other words: chemical castration. I hope you're asking yourself why the fuck a player would choose to have his PC chemically castrated, but either way, the answer is: because it makes the PC very, very difficult to seduce. And that matters, because in Dark Heresy pretty much any actor can employ social skills against pretty much any other actor. What real world human beings happens to be roleplaying the actor has nothing whatsoever to do with whether the actor can employ or be the subject of social skills. But then, why would such meta have anything to do with what actors can and can't do in-game? Oh wait, you've failed to even attempt to explain that so many times by now, that asking you again and again is starting to seem like insanity. So.. Let's just pretend I was being rhetorical.
Skills aren't supposed to be simply non magical replacement for magical spells like Charm which is exactly what you want tthem to be. They aren't supposed to change the basic nature of a creature - PC or NPC..
Who are you addressing with this? I've never claimed social skills were magic or could change the nature of an actor. I've never said that, say, an intimidation check could be used to make a Pit Fiend break down in tears or run away screaming for mommy. What I have said is that legitimate threats to a Pit Fiend do exist in-fiction, and that Pit Fiends are not incapable of self-preservation in-fiction. As already mentioned, skill use isn't some silly nebulous meta shit like "I rolled a natural 20 on my charm check, so now my character can order the local mafia boss to gun down his own minions to protect my character." The only one that has come anywhere close to claiming otherwise in this discussion, is you, Volourn.