Truly Formal Debate
One of the most important ways that Nevermore is able to utilize his abilities relating to the Theory of Forms is in creating 'Formal Debates'. Essentially, he creates a metaphysical landscape that himself and whatever individual or individuals he is talking with are able to 'experience' at the same time as whatever their physical bodies are doing. The plane is constructed in such a way that as long as those it is affecting have a Mental Deduction of at least Adept, they will be able to effortlessly perceive whatever is happening there at the same time as real life. Those with less than an adept rating of mental deduction and less than an focus rating of less than adept will likely find the split metaphysical realm incredibly distracting.

Within this metaphysical realm, Nevermore is able to depict what he regards as the 'best' parts of whatever argument he is trying to make. From there, those affected are able to choose whether they 'accept' or 'reject' that argument, which puts the ball back into Nevermore's court. From here, Nevermore can attempt to show additional 'evidence' or counterpoints within his metaphysical realm, being displayed in the most effective way possible through his connection to the Theory of Forms.

For example, the most common way that Nevermore uses this ability is to share his vision of the world in order to gain followers. He displays the various realms working in a relative kind of harmony, showing those watching the immense destruction of the previous Truth, how awful that was, the legacy of destruction that was inflicted from the world becoming destabilized from that event… and ultimately, what good he could perform by taking Truth's place. How much better things would be, how the world would be able to tick without having to worry about things which disrupt the very fabric of existence traipsing around as they please, bringing up a variety of counterarguments that he has prepared for during his time in the crystal prison.

What happens if Nevermore runs out of evidence, and a rejection by the one he is talking with sticks? Quite simply; he takes a debilitating amount of damage. This bypasses his own Defense of the Heart or any similar defensive augmentations, his consciousness, body, and soul taking direct damage proportional to the number of people who were in the session where his beliefs were rejected. Upon this kind of crash, Nevermore will likely fall to the ground, completely paralyzed, and this is the best chance one will have for trying to kill him. Ultimately, it is a success or failure; if one rejects, then Nevermore believes he has lost, and the negative effects impact him for the number of people who were in the session.

Important to note; only Nevermore is able to utilize the metaphysical realm to display his argument. Those he is arguing against have whatever is at their disposal to reply with.