First time poster, long time metaphysical journeyer, and exploring the depths of nonduality/ontology/realism.
I have a few questions regarding what we can actually know about nonduality.
As a preface, I currently see nondualism as a category of belief systems (monism, nihilism, etc) and nonduality as the concept itself of not-dual.
Does nonduality imply the absolute/ineffable is all their is? Aka...does it imply duality "this OR that" doesn't exist and there is only that which we cannot know or experience its true nature?
Or...does nonduality imply the absence of absoluteness...aka "this AND that" both exist? And does that also tag along with the "which we cannot know?"
Or even yet, does it imply neither and is still open for debate?
Lastly, even if we say nonduality exists or doesn't exist...or it is this OR that...however we add qualia to it, does it now not become nondual, and therefore we can only know/experience/talk about duality, and we are 100% conflating nonduality by trying to theorize about it? If so, doesn't that make the entire subject really pointless...like it ends up looking at itself like...well we proved that we can't prove anything!
Sorry if these are noob questions to this forum...I don't know the level at which ye speak/theorize yet or if these have already been answered

Also, please give you a reason why you believe what you do regarding my questions and not just a "no, it is actually this way" if you do comment, thanks!