memory as "information" as the comments above suggested makes the idea of warping reality pretty reasonable. if you can stretch "body" to be matter manipulation based on the form and function of things and people than "information" could be stretched to mean laws of reality like "1's" and "0's" being repeated without fail as unbreakable natural laws. plus if twin apostles have some of the others traits than a spawn of memory being able to copy another's form perfectly to the point where they have their power and the status of their original form is overwritten (such as valravn getting sustenance from syla's heart even though she's obviously not actually young which is stated as being a necessity for val and not just him being an asshole) makes sense. frankly i think it's obvious memory has to do something big (other than providing resistance to the mental domination of "authority" or the ability to travel to the other world) in order to justify the MC eventually becoming as strong as actual planet busters like malik or reality warpers like eiseth.
I thought about that, but that's just not how that works realistically.
Firstly, I'll start by saying that body affecting matter makes basically perfect sense. Body, as in body of matter. Form, if you will.
Secondly, as I said above, that isn't how information works. I think I've heard of a bunch of theories and frameworks that propose that information, and the interaction between information, is the underlying... thing, in reality (I think they were called bits), but there just isn't proof that this is the case. Information, as currently understood, is distinct from the actual state of matter.
Information, at the most basic level, is just the way something perceives that change is happening. For example, someone feeling hot is the brain processing information through the body's senses, and said brain decides to respond in a certain way.
Certain things can change their physical state according to information (the body/brain for example), but unlike matter, information isn't constant or objective, it's subjectively interpreted. Let's use heat as an example; A human doesn't process or perceive the information their senses give them about how hot it is like a thermostat does. It decides itself whether or not it should tweak its operations according to how hot it is, while the thermostat assigns the heat an arbitrary number. The thermostat can even be wrong, from a human perspective, but according to its design, the number displayed is always right.
That leads me to me saying that, no matter how either the brain or the thermostat perceives the heat, or even if they don't, the fact remains that it's still there. Regardless of the number displayed on the thermostat, if it's objectively hot enough, the thermostat will melt, or freeze if its cold. Regardless of how hot my body is feeling, if I'm standing in a lake of lava I will evaporate.
So basically, information is just a subjectively interpreted reflection of the physical. There is no 1's and 0's of reality to hack, at least in terms of information, since the information we're talking about isn't even strictly "real", in the sense that it just reflects the so called body, being the physical.