As I explained above, what you call "dualistic thinking" is just refusal to follow common definitions for relatively simple concepts. For example, Wikipedia's entry for abovementioned personhood is clear enough to say, that I and you are two distinct persons. The two of us may be called a person, but it has nothing to do with the "way of thinking", and only has to do with the definition of a person. If a definition of a person had a clause, that would prevent congregates of persons to be a person, no amount of "dualistic thinking" would make two of us, or the entire humanity a person.
Sadly, this discussion appears to be at an end. Nondualistic thought processes are not based on definitions. They are based on direct experience of the ineffable, beyond words themselves. You keep trying to impose Aristotelian logic on to paradoxes, contradictions, and nonsensical attempts to break one out of dualistic perceptions. There are numerous ways this works, from dreaming, to creativity, to peak and flow experiences of all kinds, all of which aim to break the mind out of what is perceived as separate and to give it a new holistic POV. Just as you cannot have music without the notes that define it, you also cannot have the notes without the empty spaces between them. You can pretend that the notes represent the music, but it is also equally composed by its absence in the form of silence. They are one and the same.
There's nothing ineffable in anything you are referring to. Anyone can generate tons of bullshit by combining letters and words. You are clearly much worse at Seado than I am at non-dualism. Your thought process needs to grow much before you can realize significance of Seado. Then you will learn some truth (and still it will not be universal).