Unfortunately, no... it could _either_ be a critical that misses (which is a very paradoxical thing)
First of all "score a critical hit" = "crit" = "critical hit". Pg 278 is explicit about that much.
The understanding of what a critical hit is must also allow for a distinction between
permissive language when
determining crits, as is used on page 276:
Critical hit: said:
If you roll a 20 your attack roll might be a critical hit.
** This allowance is what makes it possible to define critical hits
like the book does in a number of places, specifically, "Critical hits:" pg 276, the Valanae example pg 276, and the section on High Crit, pg 217. (Which I quoted on page 9 of this thread). Each of these defines "critical hit" in
definitive terms without qualification. There are no, "if", "might", "can", "allow" or any permissive language in any of those. That say what it
IS and what you
DO when you get a crit.
Every one of these examples talk about or define a critical hit as though it
IS a hit, and assumes a definition of critical hit that is not paradoxical, but internally consistent.
What about Mastery feats then? Don't they say you crit on 19s and 20s? Not exactly.
First of all,
even the basic rules don't say that you crit on a 20, they say you
MIGHT crit,
IF you satisfy the other conditions required apart from the number on the die. So then, the mastery feats also folllow this same paradigm, by
allowing you to get a crit on a 19 or 20, but not guaranteeing it, just like the good ole 20. I know Draco will hate me saying this, but that's why the "can" is in those feats, so they read permissively instead of definitively.
The examples of "can" (or lack thereof) in all the movement powers involve player choice (a choice that is
explicitly granted in the case of forced movement). There are no choices here, nor should there be. This is mehanical rule adjudication, and the difference between permissive language and definitive language is meaningful and should be acknowledged.
Precision still has it's place, and will be respected. But what I've just said may need to be digested first.