If all things have real form, then everything–particularly what we commonly regard as negations –has real form. Thus, ‘No Self’ exists just as much as ‘Self’ in the total Full Dynamic Functioning.
So, ‘Negation’ is not a kind of absence, but a full presence. And if this is so, ‘Not Self’ can be obstructed by ‘Self’, just as easily as the other way around.
Things do not fall in and out of existence in a logically coherent world. Existence and Non Existence are two aspects of Full Dynamic Functioning, and are always present. Whether they are present to us doesn’t matter.
So Death isn’t the absence of Life. Winter isn’t the absence of Spring.