Caliane if you could I would like you to expand on this remark
I am not saying I automatically disagree with the absolute assumption that the cerebral Cortex is not a qualifier for being alive but I would certaintily want to hear what those requirements are and how you came to them. I am assuming that since you are able to make such an outright denial of the cortex that you would have well formed reasoning and definitions on the issue.
Plants do not have cerebral cortex's yet are alive. Having a brain has absolutely nothing to do with being alive or not. Like, you are not even on the same page here at all.
Cells, bacteria, fungi, etc.
Again, paraphrased, Life is defined as a complex system that:self regulates,grows, adapts, responds to stimuli, metabolizes, is composed of smaller living systems, and/or reproduces.
the exact definition of Life is up for debate. This definition for examples allows macro-organisms, or non organic.
Is the Earth alive? it self regulates as macro-organism. algae, plankton, etc regulate the planets atmosphere and temperature. It adapts as a whole. responds to stimuli. This is what adaptation is. clearly smaller systems interacting to create larger ones. reproduce? if we ever terraform.. the Earth macro-organism would be reproducing, and forming a new colony elsewhere, which would adapt and become its own macro-organism.
now obviously, many people would pitch a fit if you try suggesting the Earth is a single living entity.
cortex development was brought up as a point of reference as to self identity, awareness and thought. Anything prior to that, incapable of awareness. It has nothing to do with life.
Life began 4billion years ago or so. and has been a continuous process ever since. The sperm is alive, the egg is alive, the zygote is alive. And that has nothing to do with anything.
This is where the brain dead issue then was brought up. Points were the body was alive, but the brain was shut down, and not functioning.