I thought it was the law of gravity. Oh well, it doesnt really matter to me. Evolution just doesnt have enough proof for me to agree with it, and many others think the same way. Its not fact, its guesswork. And science works that way until enough evidence is found.
I'm guessing that you haven't really explored how much evidence there is, since it also appears that you don't really have a grasp of the basics. As far as your "half bird, half fish" suggestion, why do you suppose that would be advantageous? In the water, I would think that "all fish, not half bird" would have an advantage in competing for food, shelter, etc. And, above the surface, "pure bird" would likely have an advantage over half bird.
Furthermore, evolution isn't determined by "what would be best" - it's determined by "which traits result in a better chance - and sometimes only a tiny bit better - at reproducing and carrying on the species."
Anyway, rough estimate: the amount of evidence in favor of evolution at the present time would take you a lifetime to view and read all of it.
Fascinating and eloquent though this slightly circular thread is, what I really wanted to ask about is your link to the myotonic 'fainting' goats.
Do you know much about them?
Since the thread is about evolution I wondered why anyone would want to breed-in a type of goat 'disability'? Goats that have to be encouraged to clean their kids are not going to make it for long in the big Goat World beyond the fence.
I have heard that some deaf parents want to breed deafness into their offspring. Because they refuse to regard their condition as a 'problem'. Is that analogous?
I know very much about them. I was the 100th registered breeder in the United States, and at one point, when there were fewer than a couple thousand registered myotonic goats, I had a lot. I currently have about 50; expecting roughly 40-50 kids to be born in about 6 weeks.
I'm not sure what you mean by encouraging goats to clean their kids - out of the hundreds upon hundreds of births, we've only had one goat experience any problems with childbirth (breech birth, lost the kid, but I saved the mother) - a lower rate than with other breeds of goats.
Myotonic goats are a meat goat. Their "disability" results in greater muscle mass - a positive trait for meat goats. Further, the tend to be far more mild mannered than most other breeds of goats, making them better as pets. Due to their condition, they really don't run and jump like most other breeds - a 2 foot fence keeps them contained, whereas a 4 foot fence won't contain many other breeds.
And, some people like them as sort of a "novelty" type of animal to raise. Thus, while you may see myotonia congenita as a condition that's bad for the goats, that very condition has actually been a positive for the goats as it's resulted in more and more people specializing in raising that breed. As a percentage of all goats, they are increasing fairly rapidly. From being the 100th breeder less than 10 years ago, there are now thousands of breeders. From a population of around 2000 goats, I don't even have a clue how many 10's or 100's of thousands there are now.
Likewise, there are plenty of other traits that someone might say aren't good - sickle cell anemia is one that's often pointed out in evolutionary studies. It confers a natural ability to not have a problem with malaria - this results in the "victim" having a higher probability of surviving to the age of reproduction - it's evolutionarily advantageous. Nature/evolution doesn't care about the lifespan of creatures - just whether they survive long enough to reproduce.