Here's a fun mental exercise for all you savvy rules lawyers out there:
So there is a murder hole in the door (really just a small barred window) which is just large enough for me to stick my arm through it. I want to shoot a fireball through it, but the GM says I don't have line of effect to do so, per the rules from the Magic chapter of the Core rulebook. Apparently you need a square foot in order to qualify for line of effect.
I knew this already, but a fireball bead streaks out from one's pointing digit/appendage, right? So if my arm (or even my finger) will fit, then I can effectively shoot a fireball through the aperture (since it will basically be created on the other side of the barrier), no?
My GM says no, since the opening is not big enough to qualify for line of effect. According to him, even though I can fit my arm through it, my character's space is still technically on the wrong side of the barrier and so the rule still applies.
What do you guys think?