I am assuming you have been having a bad day, SorO. Because you are not coming across as your usual self. You are usually much more even-headed and reasonable.
I'm never even-headed, but I just had a four hour nap if that helps. I also keep imagining JaronK screaming MMI PROVES EVERYTHING for 60 pages across eight different boards and now look, a whole new generation of app based people not used to reading anything not contained in a text message. >.>
Point(s) being Spellcasting isn't typed anywhere, to type it is to be adding house rules no matter what kind of validation you think you have.
They are not considered a Special Ability even in the MMV either.
If you wonder why I think anyone attempting to cite this book needs to be smacked upside their head before being so retarded they were kicked out of special education, it's probably because the damn book makes a better point proving it isn't. Check the first few pages where Reading the Entries flat out states SA/SQ is to have a copy of all Special Abilities (I'm short handing to SA) even if printed else where, and how the SA Descriptions entry and Spellcasting is separate. Now flip to page 84 for a Hobgoblin Duskblade and tell me what the hell you see. The MMV did create a Arcane/Divine Talent SQ that grants spellcasting yes, but as pointed out this is not a retroactive rules replacement retype casting spellcasting. So it you want to talk about digging through books for fun monster abilities to obtain by Polymorph yeah Arcane Talent is pretty awesome and is a worth while mention, but if you want to talk about rules on spellcasting you're about as far removed from the pertinent rules as the ingredient listing on my pepsi can is.
MMI's opinion is ignorable anyway.
The only "for" argument is
Spells is listed as a SA in the MMI's glossary. And even then it remains untyped which goes back making up house rules regardless. Even so, as the Errata states the MM is not rules on spellcasting and any contradictions (such as saying it's an SA) that opposes the PHB is to be ignored. You want rules on Spellcasting? Read Chapter 10 and 11 of the PHB, anything else really doesn't matter barring the obvious exceptions like the RC or Errata.
And well... That's it really. The only points anyone thinks that have is smacked down in two poorly written paragraphs that summarize to read the book. The point that type casting is a house rule, while true, is never even reached and is almost as bad as an illogical leap that Spellcasting is Ex vs points that it's better typed as Natural (rules would state so) or Su/Sp (ex is none-magical).
***
Also, Antimagic Field doesn't
block spells, it
suppresses them. It's a huge difference. Spells are not blocked within AMF unless it's duration is instantaneous for obvious reasons. So for instance you can cast Haste on your self while in an AMF and as soon as you step out (assuming within haste's duration) you'll gain the benefit from it. Haste is neither canceled nor blocked merely it's effects are suppressed so long as you remain in an AMF. It's why Invoke Magic works*.
*ding* The more you know.*Well, mostly on that works part. Funny thing about Invoke is it contains no text stating it's effects are not suppressed in AMF, meaning you cannot gain it's benefit while standing in an AMF your self. It's only useful to cast into an AMF while standing outside one, probably not intended, but that's how it works without house ruling otherwise.