@Paxton better non confusing question.
If someone with better vector control that accelerator were to push him against his shield, would they move him or would they just go through the shield and hit him?
Well, first off... it's not a shield. I hate people describing it when people describe it this way. It's a bubble of warped reality where Physics bend to his will and work a certain way (and also work through probability manipulation but w/e). That's basically the core of Esper abilities.
It surrounds and permeates within him, which is why he can deal with internal attacks even if they don't necessarily have a "projectile" or if they originate inside him.
If it moves (or even if it doesn't technically have the standard definition of a "vector", Personal Reality shit is weird) it falls under what he can deal with.
Electromagnetism, sound, light, heat, punches, fuck-strong attacks like Coronzon's Sword (which has some hax attached to it), etc.
The more knowledge has = the more hax he gets. Since he can just straight up apply this shit to stuff and be like "this has a vector now lmao". With obvious limitations of course, such as how well he "understands it" (we talked about this when Iihiko from Medaka Box was brought up iirc) regarding the knowledge he has at his disposal.
Knowledge is quite literally power in To Aru.
And considering how ridiculously smart he is + the fact that his artificial demon buddy Qliphah has the ability to just show an opponents history on her dress... yeah.
It's why his powerset is so ridiculous even in-universe.
And it really depends on the person and how potent their ability is tbh. He's kind of the poster boy for this specific kind of ability last I checked.
It's still a really weird interaction regardless, so... maybe?? maybe not? I don't know honestly.
TLDR: It's complicated.
