When I say criteria I mean like x biological functions or y genetics.

If it were to be appearance,anatomy. A corpse completely looks like a man. Moreover a person who has had their 4 limbs amputated, has a single largely malfunctioning kidney(they are on heamodialysis), has had every vestigial feature, like the vermiform appendix, wisdom teeth, surgically removed due to health problems. Their digestive function is almost dead. Their eyes gouged out by accident. Has severe problems in their brainstem. They can't swallow, they can't speak, they can't hear, they.....

Basically they only breathe, and have something to circulate because of artifical support. They are almost brain dead.

Even such a person that looks nothing like a man, anatomically. Is definately a homo sapiens. They are actually protected by law. They cannot have their life-support removed or be left to die. At least not in countries like Germany, Italy, Greece, France, Spain,Portugal. Legally any so.

They have every single organ system severely damaged and any more damage to a single organ system would kill them.

What makes a living homo sapiens.

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    $\begingroup$ An answer will necessary be drawn from opinions and not evidence. There is no working definition of Homo sapiens beyond the set of individuals that actually exists. If you want to invent a creature in your mind and ask whether it is a Homo sapiens, science won't help you much for that. If you want to consider someone in a coma as not being a Homo sapiens, then it would be surprising to me but you do as you like. If you want to consider HeLa cells as being Homo sapiens, then it would also be surprising to me but again, it is very much up to you. I am VTC as primarily opinion-based. $\endgroup$ – Remi.b Aug 23 '19 at 19:23
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    $\begingroup$ Philosophical questions are not on-topic here. $\endgroup$ – Bryan Krause Aug 23 '19 at 19:24
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    $\begingroup$ @GeorgeNtoulos Yes it is. Your previous question of the same type was also correctly closed. Please stop this argument. $\endgroup$ – Bryan Krause Aug 23 '19 at 19:49
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    $\begingroup$ @GeorgeNtoulos Asserting your question is about taxonomy is not sufficient to make it so. Your question is not about taxonomy. There are many answered questions about hominid taxonomy here. $\endgroup$ – Bryan Krause Aug 23 '19 at 20:13
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    $\begingroup$ @GeorgeNtoulos Taxonomy groups individuals. It does not operate on a continuous space of hypothetical cases. $\endgroup$ – Bryan Krause Aug 23 '19 at 20:46