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I followed the mainstream definition of life and showed using MIT, Harvard and Oxford articles demonstrating this. They all conclude there must be a LUCA.
The Last Universal Common Ancestor and the first lifeforms are two very different things, probably separated in time by hundreds of millions of years and trillions of generations of replication. You only shown that you have no idea about the things you are talking about. The articles you cited are talking about the last organism that all life on Earth now descended from(LUCA), not about the first lifeforms, which were neither plants or animals, only protozoa of many forms and ever increasing complexity. There probably was a LUCA, but it was not the first nor the only form that existed when it did. You cites are totally irrelevant to the first lifeform.
I followed the mainstream definition of life and showed using MIT, Harvard and Oxford articles demonstrating this. They all conclude there must be a LUCA. They all agreed it must construct its own food.
Actually, if it could construct it's own food it cannot be the LUCA, as animals and many bacteria do not and can not do so. To be the LUCA it must have traits common to all life, only plants and some bacteria construct their own food. Since the guys at the institutions are not ignorant of this, it is you who is ignorantly interpreting what you have read.
They also agreed LUCA must have evolved in a temperate environment.
That is their opinion, there are others, and none have conclusive evidence.
If you can't, then your are a troll and should be banned.
Step very carefully here, it is your behavior that is most trollish here, ignoring the answers you receive, repeatedly repeating pseudoscientific arguments already debunked and refusing to explain what your understanding is despite repeated requests, thinking you know better than professional scientists and twisting cites for your own ignorant arguments. Your candle here is getting shorter by the post.
Also, we must not forget, MIT proved in 2009 that TOE is false
Absolute, 100% pure, barnyard grade male bovine poo. They did not do(or claim to do)anything of the sort. That is a lie, either through total ignorance of the facts or dishonesty, your choice. All MIT said is that there are effects of the mothers early life that have an effect on that mother's offspring. It did not disprove evolution but like chiclids can change their morphology in response to certain predators in the environment(without the predator chiclids have no dorsal spine, with the predator the spine appears in offspring)it is caused by the expression of certain genes in some conditions and others in different conditions. All of the expressed genes are the result of evolution. No gene is created by the mothers experience, but the experiences trigger the expression of certain sets of genes. Another, similar situation is at work that produces more homosexual male offspring if the male is the second or third son born in human mothers. The genes are not altered but developmental sequences and gene expression is. If MIT had disproven evolution it would have been the biggest story in the news but this study seems instead to have died a quiet death, as many such claims do when they turn out to be erroneous or not supported by subsequent study. You really have no scientific understanding of what you read, do you?
Now, I have presented several articles from Oxford and Harvard that back up this claim as they seek a viable candidate for LUCA (single source which itself came from an inorganic form).
You've certainly illustrated your total inability to understand what LUCA was. It was far from the first lifeform, it was just the last lifeform that is common to all current lifeforms. It was not the only lifeform to exist at the time it existed, it is just the only one that left offspring that survived to today, and it did not create it's own food(only plants and bacteria do that, not animals and the majority of other single celled lifeforms, so they can't have a cell that produces food in their lineage). Again, you know nothing about LUCA except what you misinterpreted from some articles you cherry picked for your spurious arguments You'll never win an argument from a position of abysmal ignorance of what you are arguing about.
"The theory of evolution is an explanation for the existence of life on Earth through random, natural processes. More formally known as the General Theory of Evolution, it was defined by the evolutionist Gerald A. Kerkut as the theory that all the living forms in the world have arisen from a single source which itself came from an inorganic form."
That form was not LUCA, it was a simple, self replicating molecule that formed many hundreds of millions of years prior to LUCA(which probably existed a little over 3 billion years ago, though the question is still open). We KNOW that stromatolites existed at that time and they were one of the first "plants" as they used photosythesis to create oxygen as a byproduct.
This chart is what we know of evolution. U are here, the center is the first lifeform(it's empty because we know little about them), time begins in the center some 3.7 billion years ago. The innermost circle is LUCA. Between the center and Luca is a space representing several hundred million years of evolution in lifeforms, all but one of which did not survive. Learn something.
Grumpy