I may misunderstand your request to "prove an artificial construct for humans to demarcate something that only matters to us"
In truth I had to look Demarcate up.
if to make a construct set the boundaries we wish, that matter to us. its called programing.
I'm not trying to be a jerk. but i...
I do not agree. We do not define knowledge with "what it" we define it with facts, proven and re-creatable data that is as close to irrefutable as possible.
the "what ifs" are what causes science to look for the facts to prove or disprove it.
The truth is. we need the What ifs, they help...
the questions WAS, Life.
now the question becomes human?
once the brain is replaced. that thing is n o longer a human. it could be programed to act as human as it can but it is not human.
is it alive? debatable.
Ok, I know this is going to ask you to stretch here, but.
Data on star treck was an android
who could eat and excrete.
could breath (movement to simulate)
breath deep and read on.
It would be wrong of us to ONLY look for life as we know it and suspect something that is not like us...