How to know whether 'Consciousness' is just an output of ever-changing physical element too - in this case flow of energy in neurons.
These flow of energy changes the states of neurons and sum total of that is perception of the 'world' which we think is the consciousness.
Corollary - Due to the quantity and 'quality' of each neuron in each individual, the perception of the world or the reality would also vary for each individual.
While the patterns engraved in the past cannot be changed, they also cannot be easily retrieved and my own perception of self ends when there is no longer a brain changing my “state vector”.
These flow of energy changes the states of neurons and sum total of that is perception of the 'world' which we think is the consciousness.
Corollary - Due to the quantity and 'quality' of each neuron in each individual, the perception of the world or the reality would also vary for each individual.