Hard to vary argument for superimmortality

The "hard to vary argument for superimmortality" is the argument that it is not easy to vary awaretheory thus it has extra merit as a scientific theory.

The science of superimmortality predicts that identical structure and functioning of matter in a body produces identical behavior, consciousness, and ixperiencitness. If this is not always the case then there has to be a testable physical reason (explanation) for it that is not supernaturally connected in any way. The mortalist predict that identical structure and functioning of matter in a body may or may not produce identical behavior, and consciousness, but it can never or will never produce identical ixperiencitnesses. When it does what will be the explanation?

What is the mortalist explanation for why identical structure and functioning of matter in a body does not produce identical behavior, consciousness, and ixperiencitness? Especially when experimentation will show that identical behavior will be produced and then that this behavior gives convincing evidence that identical consciousness is produced.

Is it a reason to say that identical structure and functioning can not be achieved in another body so we should not even consider it? This is just avoidance of the question.

The mortalilst view point is a rejection of the principle that the functioning of the brain producing consciousness and ixperiencitness.

For more about this concept see "David Deutsch's TED talk: https://www.ted.com/talks/david_deutsch_a_new_way_to_explain_explanation#t-857662