Originally Posted by Alatar
it doesn't have to be in the gene pool already...
If a gene in one of your gametes changes a bit due to some mutagen, or maybe errors in copying of DNA and then that particular cell ends up in part creating the genome for a new human, that human has a chance of getting that mutated gene (depends of course if it's recessive etc.). Now that gene might have a negative effect, a positive effect or in the huge majority of cases it will not have any effect at all. But yes it can have a positive effect due to the random effect the mutagen/error in copying DNA had.
And please if they can't be positive, do tell how evolution actually works. How do bacteria get resistances to antibiotics so fast?
If I learn something new and in the end I'm resistant to something, does that mean I'm mutating? No!
If bacteria has the capability to gather and analyze surrounding information, use that information and adapt to its surrounding for adaptation purposes, it should not be called mutation. Reason to that is because it didn't mutate. It gathered and learned new information. We human do that all the time. I avoid idiots and stupid drivers on the road; therefore, I'm resistant to them. It doesn't mean I mutated. That's the point I'm trying to make across.
From the science and logic perspective, the good mutation does NOT make any sense. Many of the so called mutations are simply put adaptations.