User blog comment:IamJakuhoRaikoben/Sorcerer Magazine, Issue 41: May 2015/@comment-25111584-20150602132552/@comment-1153699-20150602171642

@Sane -> Was your question aimed at me? Because if it is then I would say no, obviosuly. She can't.

She can't deflect Acnologia's Roar because the amount of Magic he puts in it is way more than the amount of magic Minerva puts in her Space Magic. It would be like Midnight trying to deflect Sema or Grand Chariot (which he couldn't do), or Gemini trying to change into someone with stronger MP than it's caster. If Laxus and Natsu use their roars on each other at the same time, Laxus would win. Since it's a battle of magic. And Laxus has much more MP than Natsu so he can put more magic in his attack than Natsu can.

That's how I believe Laxus broke out of Mystogan's Illusion, and that's also how DF Natsu managed to break out of Genesis Zero.

@Choko -> That is an example of http://en.wikipedia.org/wiki/Argument_from_ignorance and No Limits Fallacy. Both are false ways to look at things when debating.