>>149933385
That's correct. I'm sure this sounds pedantic to non players but it actually matters. There are attack sources that say they can't be negated. And as such, cards like pic related would not work on them. But mirror force resolves before the attack even happens.
The Pokemon card game actually has precise rulings like this too. Like Pokemon powers that protect Pokemon from attack damage, but not from damage counters being placed directly on them. It's just not relevant to Ash.