I see. That's a good point, its difficult to say if DNA has no junk. So I'm going to avoid the categorical issue, of junk,non junk,essential,redundant(but usefu

I see. That's a good point, its difficult to say if DNA has no junk. So I'm going to avoid the categorical issue, of junk,non junk,essential,redundant(but useful in a replication failure). maybe My thoughts are this, DNA is not used just for an individual survival but also a mechanism to allow adaptation at some higher level. Like how some deep learning AI's learn how to play games by making random moves and getting feedback from the score changing. For DNA, we get random mutations/moves in the form of transcription,replications errors or Meiosis , and the feedback comes from successful reproduction(surviving to play the game again). So what we call junk DNA, might actually play a large role in this sort of "learning" mechanism. I hope I explained that decently. A lot of my thoughts come from this book http://en.wikipedia.org/wiki/The_Selfish_Gene http://en.wikipedia.org/wiki/The_Selfish_Gene