To "something" which is identifiable and that which is "identifiable" as "this" (which is said to be "impermanent") may appear so based on the construction of "own being" of "this". Otherwise if there is no "own being" to what does "this" (which is said to be "impermanent") refer to?
Wow. Thats a heck of a question and neatly phrased too. What it brings me up against is that the ground or point from which one is looking is empty as well.
But is the question actually meaningful, or might there be an unstated assumption or three lurking there?
This being is bound to samsara, kamma is his means for going beyond. -- SN I, 38.
There is freedom from birth, freedom from becoming, freedom from making, freedom from conditioning. If there were not this freedom from birth, freedom from becoming, freedom from making, freedom from conditioning, then escape from that which is birth, becoming, making, conditioning, would not be known here. -- Ud 80
Ar scáth a chéile a mhaireas na daoine.
People live in one another’s shelter.
dheamhan a fhios agam
Damned if I know.