Er, that's not what was said. Never was said that the GM should fiat. What was said was that if you spend years in game practising at magic, the GM should make Dungeon World feel real and give you the benefit of what you've done. Just because you haven't spent an advance on it you can't car spells regardless of the fact that you've been studying for years? That seems odd to me.
That is literally DM fiat. The most clear and text book example I could think of. Anything that happens in a game because the DM simply decided it should (or to permit it), and not on game rules, is DM fiat.
Now, DM fiat is not a bad thing, or something that shouldn't be done at the table. Quite the contrary. Judicious use of it is an essential part of DMing. And Dungeon World's greatest strength is it's clear, and well defined understanding of where DM fiat should be applied, and where the players are given mechanical agency through Moves.
My point was rather that DM fiat, as cited in an argument by the poster I was responding to, does not in any way demonstrate that any mechanic is "good" or even "not bad". If a group decides to ignore a game mechanic, and come up with something else instead, how can that possibly demonstrate that the game mechanic is good? Any and all mechanics in any RPG ever can be ignored if the group wants to.
Just because you don't like the mechanic doesn't mean it is bad, nor a "trap".
What's your point? That it's just my opinion that the mechanic is bad, and a trap? Well, yes, it is. Obviously. All any of us could possibly say on the topic is an opinion. Saying that it's just my opinion is meaningless. Attack my arguments if you think I'm wrong.
I won't speak for others here, but I really don't think you've given any compelling arguments that the mechanic is bad, just that the mechanic doesn't do something you want it to, and are unhappy that the response from others isn't to agree with you, but rather to say "if you don't like it, don't run it that way."
No, I'm dissatisfied that the response from others isn't to actually disagree with my arguments, but raise points that are entirely tangential to them. The existence of DM fiat is irrelevant to what I'm saying.
So, please, tell my why my argument that the mechanic is a trap for new players and roleplayers is unsound. Tell my why it's necessary for this one mechanic to determine the fiction, when the whole game is based on
fiction determining fiction, not mechanic.
But telling me "if you don't like it, don't run it that way" is meaningless. Of course I don't have to run it that way. That is always true, of any mechanic. It doesn't need to be stated, and in no way undermines any arguments I or anyone else could ever make about game design.
Understand that I'm not posting out of concern as a player. I
am that optimizing, system mastering, powergamer that won't fall into the trap of not taking multiclass dabbling in casting at level 2. As a player, the mechanic's flaws don't apply to me. As a DM, I don't care that much either. To me, the flaw is manifest, and so is the solution. The rest of the game is good enough that patching this flaw won't put me off of it.
Rather, I'm posting on a discussion forum, for an in-beta game, suggesting how I think it's design could be improved. In that context, telling me "if you don't like it, don't run it that way" is a non-sequitor.
Anyway, the difference between the multiclass moves and gaining the moves via descriptive, fiction first, positioning is exactly that: one way you get to prescriptively say, "I've learned how to cast spells," and the other way you say, "I'm going to practice magic junk every day with the wizard," and through a lot of plot and description and probably more than a few moves you eventually learn how to do magic. Maybe you get the Cast A Spell move with associated stuff, maybe you get a custom move related to hedge magic. Depends on the fiction. It's not demonstrably folk ignoring the multiclass rules, it's folk approaching the same goal differently. That's not a bad thing.
It's folk approaching the same goal differently,
by ignoring the multiclass rules and using fiat instead. Now, again, at the table, that's OK. If people want to ignore mechanics and do something else, more power to them. 'tis the wonderful nature of RPGs.
But the point of mechanics is to give players clear elements where they can do things without having to ask for permission from the DM. This gives the players a greater sense of agency in the world, and greater sense of accomplishment when they accomplish their characters goals not simply because the DM said they could, but because
they said the could.
So, as game design, it still means that new players and roleplayers are being punished for their lack of system mastery. It means that I, the optimizer, have greater player agency because I can use the system mechanics to build the character I want, in an effective way. And of course, I have just as much access to DM fiat as anyone else.
Whereas the new players and roleplayers that didn't take Dabbler at level 2 need to either accept a permanently gimped character (if they actually use the game mechanics), or appeal to DM fiat to have the character they want. They have fewer/less-good options, as players, than I do, for no good reason I've seen. I don't think that's fair.
(edit: removed reference to Oberoni crap. After reading more posts on it than I care to ever again, it appears nobody knows what it actually means and it's just a catchphrase to not actually mention any formal fallacy. Will now never mention Oberoni again, and if you want to discuss formal fallacies, actually discuss formal fallacies. Otherwise I will assume you are using a bunk appeal to authority, which while not a formal fallacy still leads to a weaker argument when your sources stuck are uncited)
I said exactly what I meant, so what anyone else thinks Oberoni fallacy means is irrelevant. If you think I was ambiguous, or incorrect in what I said, then say so.
I did not cite Oberoni as an appeal to authority, or to imply it is a formal fallacy. I would have thought "in D&D circles" would have made that manifestly obvious. I cited it only as, well, a citation. I was appropriating someone else's thoughts (the poster named Oberoni), and to not cite him would be plagiarism. This being an internet forum, the readers of which having ready access to search engines, I did not think a formal "source" would be necessary.