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Because of the logical laws of natural selection, a giraffe with a long neck has more chance to survive than one with a short neck, because the former can reach higher in trees, eating food that no other giraffe is able to eat. Up to that point, I think we all agree. It is also very logical of the article's author to write that a long neck is impossible with the valves present in it.

Because of the logical laws of natural selection, a giraffe with a long neck has more chance to survive than one with a short neck, because the former can reach higher in trees, eating food that no other giraffe is able to eat. Up to that point, I think we all agree. It is also very logical of the article's author to write that a long neck is impossible with the valves present in it.

The point where the author is wrong, though, is that he forgets that the development of this neck went very slowly, and through many generations (and in case evolution is correct, it is likely still developing). The first giraffes which had a slightly longer neck than their smaller fellows, didn't need any special valves for this difference that was, at that time, probably still hard to observe with the eye. They were taller nevertheless, so they had a higher chance of surviving. That way, the neck "grew longer" through generations, up to the point that an '''even longer''' neck would be no longer beneficial, because the blood would then not be able to reach the head anymore.  

::::The point where the author is wrong, though, is that he forgets that the development of this neck went very slowly, and through many generations (and in case evolution is correct, it is likely still developing). The first giraffes which had a slightly longer neck than their smaller fellows, didn't need any special valves for this difference that was, at that time, probably still hard to observe with the eye. They were taller nevertheless, so they had a higher chance of surviving. That way, the neck "grew longer" through generations, up to the point that an '''even longer''' neck would be no longer beneficial, because the blood would then not be able to reach the head anymore.  

At this point, all it takes is the first valve to develop in the giraffe's neck. Please note that most, if not all, animals (including giraffes. Humans too, by the way) have a rather simple valve system all through their body to improve the flood of blood. So, we have our giraffe with a neck so long that it would need stronger/better valves to continue growing. It is very logical that this animal will have a higher chance to survive if it develops a valve in its neck.  

::::At this point, all it takes is the first valve to develop in the giraffe's neck. Please note that most, if not all, animals (including giraffes. Humans too, by the way) have a rather simple valve system all through their body to improve the flood of blood. So, we have our giraffe with a neck so long that it would need stronger/better valves to continue growing. It is very logical that this animal will have a higher chance to survive if it develops a valve in its neck.  

The longer the neck, the more problems there will be for the blood to reach the head. But also; the longer the neck, the more food the giraffe can get. There is obviously a balance between those two, where the neck has the exact length that balances these two things. If this balance point is reached and a ''valve'' is added, the giraffe will be able to continue growing its neck, until the next balance point.  

The longer the neck, the more problems there will be for the blood to reach the head. But also; the longer the neck, the more food the giraffe can get. There is obviously a balance between those two, where the neck has the exact length that balances these two things. If this balance point is reached and a ''valve'' is added, the giraffe will be able to continue growing its neck, until the next balance point.  

If this whole process repeats itself, the giraffe is perfectly able to grow a long neck, albeit (like everything in evolution) very slow. I know this explanation may not be explained very well, but I think it's enough to show that irreducible complexity can perfectly develop through evolution, taking into consideration that all of this is a very gradual process, and two things can perfectly develop simultaneously this way. Please tell me what you think about this. -[[User:MalP|Mal Peeters]] ([[User_talk:MalP|talk]]) 17:19, 8 August 2010 (EDT)

::::If this whole process repeats itself, the giraffe is perfectly able to grow a long neck, albeit (like everything in evolution) very slow. I know this explanation may not be explained very well, but I think it's enough to show that irreducible complexity can perfectly develop through evolution, taking into consideration that all of this is a very gradual process, and two things can perfectly develop simultaneously this way. Please tell me what you think about this. -[[User:MalP|Mal Peeters]] ([[User_talk:MalP|talk]]) 17:19, 8 August 2010 (EDT)