Yet you do the very same thing in your post #231. I don't know if you realize it but you sound just like an evolutionary biologist. ;)
In general, scientists are very aware of the limits of knowledge in their field. However, the media filter makes things sound very strange and there are people with a political agenda who will use anything to get their way. When scientists exact words are quoted here on FR, creationists complain that they use words like "seems to", "it's probable that", or "this evidence suggests". So you can't have it both ways.
In the case of organisms growing arms and legs, Ichneumon's post documents the fossil evidence of this occurring. Alternative points of view to evolution don't address the fossil record. That's why I was being satirical about the previous poster's ID prediction.
The problem for anti-science is that there is an enormous amount of fossil evidence. More than any one individual could view in their lifetime. Creationists can't address it. They're still looking for the origins of seaweed. ID'ers can't address it because they have a rhetorical argument, not a theory. They're still struggling to understand complexity. So they've chosen to pick on something well documented, like the development of flagella or eyes (there are over 3500 different kinds), but have ignored truly complex structures like the brain.
Evolutionary biology is still the best explanation. And our understanding of how this works is growing daily. If we're lucky, we'll be here long enough to see a pill that can grow someone a new kidney. But who knows.