Shermana wrote: What points am I supposed to acknowledge? You throw out my sources, our sources conflict ,and you base your claim on an Isotope dating method which we don't agree with, lay off.
No one threw out your sources. Your source just doesnt support your claims. Ive pointed out several times why your link doesnt support your claims, and each time you have failed to acknowledge or discuss the points raised in my posts.
<<and you base your claim on an Isotope dating method>>
Ive mentioned geologic eras, but my argument is not based solely on an Isotope dating method. Anyhow, radiometric dating is well established science; and this is the science subforum. If you dont want to discuss science, then go back to the mythology and theology subforums.
<<lay off.>>
No, this is a debate forum, and I enjoy debating. Its just courteous for debate participants to acknowledge points raised and to retract claims that can not be supported by evidence.
Shermana wrote: Because that's not something which counts as evidence, and it won't be accepted here.
Im not sure who this quote is attributed to.
Shermana wrote:Your evidence is the simply existence of Stromatolites. That's it. That's not accepted.
(A) Are you denying the fact that stromatolites exist?
(B) My evidence is
not simply the existence of stromatolites. If this is what you think, then you have either a reading comprehension problem, or a reading problem. Please go back and reread our responses to your posts.
Shermana wrote:The fact is, you think that just because there are Stromatolites, that they HAVE to have resisted 1000% the UV (and my source for that is the NASA study which says that at 2/3 Ozone gone, there will be a 660% increase in UV).
This is a strawman argument. No one here ever claimed that cyanobacteria/Stromatolites can or has to survive 1000% the UV. That you continue to make statements such as this means that either you (A) havent read our posts; (B) havent comprehended our posts; (C) are having trouble fitting the facts into your belief system; or (D) are intentionally using a fallacy to obscure your incorrect logic and reasoning.
My argument, and the argument of others is:
(a) Billions of years ago, less UV radiation reached the surface of the earth (the sun was dimmer, and there was more volcanic activity.)
(b Harmful UV exposure decreases rapidly at increasing depths in the water column.
(c) Marine organisms evolved ways to protect themselves from UV, including UV-absorbing pigments, the ability to repair DNA damaged by UV, and developing behavior to avoid UV by staying in deeper water.
(d) Cyanobacteria lived for at least 500 million ozone-free years, in colonies known as stromatolites. These colonies have a biofilm that allows visible light to pass through, but protects the organisms from harmful UV radiation.
(e) Even if, hypothetically, cyanobacteria could not survive before there was an ozone layer, this does not prove your claim that grass, herb yielding seed, and fruit trees existed before there was a sun.
Nowhere will you find someone arguing that cyanobacteria can resist 1000% the UV.
Shermana wrote:That's where the stalemate is.
There is no stalemate. You have made claims; I responded. I make claims; you avoid my arguments. The ball is completely in your court.
Shermana wrote:Calling my criticisms incoherent doesn't disprove them either. You say the possibility exists. Prove that this possibility exists.
I already have in
post 76. Cyanobacteria produce a biofilm that is very effective at shielding harmful UV light.
Shermana wrote:You want me to retract the claim that the BG Algae can't survive at 1000% UV? Why don't you prove that it can first.
No, I want you to acknowledge the following:
(a) Billions of years ago, less UV radiation reached the surface of the earth (the sun was dimmer, and there was more volcanic activity.)
(b Harmful UV exposure decreases rapidly at increasing depths in the water column.
(c) Marine organisms evolved ways to protect themselves from UV, including UV-absorbing pigments, the ability to repair DNA damaged by UV, and developing behavior to avoid UV by staying in deeper water.
(d) Cyanobacteria lived for at least 500 million ozone-free years, in colonies known as stromatolites. These colonies, still around today, have a biofilm that allows visible light to pass through, but protects the organisms from harmful UV radiation.
(e) Even if, hypothetically, cyanobacteria could not survive before there was an ozone layer, this does not prove your claim that grass, herb yielding seed, and fruit trees existed before there was a sun.
<< Why don't you prove that it can first.>>
If you send me $5000 bucks, Id be happy to fly to Australia, visit some cyanobacteria colonies at Sharks Bay, and do this experiment.
Or we can listen to scientists who have already researched this, and have found that the minerals in the biofilm of cyanobacteria effectively blocks UV-B and UV-C radiation.