Rob,
So, what's your point mark?
My point is that having a biological source of adenine doesn't rule out another source.
The point is... that adenine being manufactured in the living machinery doesn't mean there is another source either.
So, I ask again, what's your point? Because the above means nothing as far as this thread is concerned, it doesn't rule out other sources.
If you are trying to make the point that adenine production is impossible outside of living organisms, then you have failed to show it, you are in the position of disproving a negative, as has been pointed out several times.
If you are merely pointing out that adenine production hasn't been observed outside living organisms then I have to ask, so what? It has never been observed to never have occurred, either.
Mark
There are 10 kinds of people in this world; those that understand binary, & those that don't