The theory predicts what has happened, not what will happen.
/facepalm
Scientific predictions are not like "prophecy" or "telling the future", mate....
Scientific predictions are descriptions about what you should and shouldn't be able to observe in the world, if the model is correct or false.
As such, evolution predicts that you won't find amphibians with hair.
Because if evolution is correct, then life is a family tree. A family tree is a branching pattern. A nested hierarchy.
That means that every branch will have traits that you'll only find on that branch and its sub-branches.
Hair is such a trait that is found on the mammalian branch.
So you won't find it on the other branches.
Same goes for feathers... you won't find mammals with feathers.
You can do this for anatomical traits and you can do this based on genetics. It should hold up for entire DNA strings, gene sequences or even individual genes or genetic markers.
For example, viral insertions that happened AFTER the split between the common ancestor of gorilla's on the one hand and the common ancestor of chimps and humans on the other, should only show up in either gorilla's or humans and chimps.
This is exactly what we find.
If evolution is false, why do we find these things? Why is the nested hierarchy in life
exactly as we would expect if evolution were true, while it is really false?
Why does literally ALL this data, point to common ancestry of all living things?
And just to be clear... it doesn't stop at mere comparision of anatomical and genetic structures...
It's even evident right down to the geographic distribution of species.
You don't find any kangaroo's outside of australia.
You don't find any human remains next to trilobites.
You don't find any rabbits in pre-cambrian strata.
Literally
everything is exactly as it is expected to be, if evolution occured. And while there are literally a gazillion potential ways to falsify it, nobody seems to be able to.
What does that tell you?
That's a pretty good justification to accept that it in fact occured.
It's the 'mousetrap' all over again. Because there is a complete mousetrap now there must have been an incomplete mousetrap sometime in the past that organized itself over time into a complete mousetrap.
No. There is no such thing as "incomplete" creatures or traits. Every creature that ever lived was a "fully formed" member of the species it belonged to.
A pinguin does not have "half a wing".
Isn't "nested hierarchy" just a different way of saying common design i.e. design that is common or unique to that species?
No. Nested hierarchy is about the
pattern of similarities.