It was a simple question, but obviously even a simple question like that is too difficult to answer.<quoted text>
Oh look out, it's Peru with his "How do YOU know, where you THERE?!?" argument! Cosmic Sheep last Thursdayism ad absurdum.
You see, I wouldn't have minded had the person in question said something like, "According to the best research we have available, we think..." but instead we see blanket pronouncements being made that oxygen was formed once microbes developed photosynthesis and that this resulted in red iron bands in rocks.
While this might be a nice theory and hell it may even be TRUE in order for it to be knowledge it must be a justified true belief (see http://en.wikipedia.org/wiki/Theory_of_justif... ). I was merely hoping to hear the empirical findings that warranted said belief considering that the best I was able to do was http://www.wired.com/wiredscience/2009/05/rib... in which we find that two of the four nucleotides that make up RNA were successfully created under conditions that are classified as "plausible" and it is indicated that these conditions are what one "might imagine took place" (which seems to me to be a far cry from the "we know" statement contained in the post).