So about yesterday...

I thought about it more and i kind of agree and don't at the same time... it makes perfect sense that we all came from the same cell sure, but my argument was that the constituents of the cell didn't come from the same chemicals per-say. Also should we use this like a chat or just post complete stuff? Probably just complete ideas...
- Torin

At this point in the discussion it is important do use the definition of life. Wikipedia states that something is called life when it has a self-sustaining process. I'm rusty on my biology but I would dare to claim that nothing  will be categorized as life on a sub-cellular level. Therefore all those constituents off a cell you talk about have not existed with a self-sustaining process, thus not life. The cell constituents that existed in the first self-sustaining cell  back in the days are not remotely similar to the ones we see today and were just mere complex chemical reactions. I believe that when they by coincidence started to collaborate, evolution exploded and all life originates from that one cell. I would think that the odds for all those complex chemical reactions and molecules to come together so perfectly is so small that it is most likely that life originated only once on planet Earth.
- Magnus

I agree we must use the definition of life, and therefore sure, we all came from the same cell. YAY we agree, except that the definition of life is not simply a self-sustaining chemical reaction; Even in labs today scientists have made self-replicating molecules but do not remotely classify them as life. I was looking this up today and that was part of the reason i decided to side with the last universal ancestor theory. What got me is that if you look at all life now, it is composed of one or more very similar, basic cells (human DNA can be transplanted into bacteria and it the human genome will be replicated, even though it's useless to the bacteria), all divisions of a parent cell... so yes, i think we all originated from the same cell :). My point is that the constituents of a cell would've been self sustaining or else they would not have lasted long enough to become integrated into a cell. In other words, a cell is a big sack of self-maintaining chemical reactions that happen to be beneficial to each other?
- Torin