why not? eyes suppose to evolved about 50 times. so why not some mammals traits?
The eyes that evolved at different times are very different, evolving with different DNA and different structures. The ability to sense light is very valuable. The ability to sense the pattern of light coming from an area (using eyes) is also very valuable. So the fact that many creatures used the available structures they had to develop sight is not a surprise. That is different from having homologous eyes.
why not? if he have all those mammals traits then it will not be a mammal?
For the same reason that a bat is not a bird. Having a wing does not make you a bird.
A reptile that could produce the equivalent of milk, control its body temperature, and produce structures similar to hair would not be a mammal. It would simply be a creature that had found a different way to evolve these adaptions.
Mammals don't just share the ability to make milk and control body temperature. They all do this using the same basic body structure and DNA coding. Since there are many body structures that could produce nourishment for the young or control body temperature, and many different DNA codings to do this, but all mammals use the same pattern, that is indication they all evolved from the same ancestor. Else, why would they all do it the same way?
You are talking about imaginary reptiles with boobs. Since no such creatures exist, why the big deal? Should you find one, then evolution would strongly predict the DNA and body structures to produce that milk-like substance would be very different from that in mammals.
again: the same can be said for any complex trait that suppose to evolve by a convergent evolution. but in fact its happened according to evolution. also; there is also a different between mammals themself. and still scientists claiming that they evolved from a common mammal. so difference or similarity doesnt saying much.
There is a difference between the arm of a man, the paw of a bear, and the wing of a bat. And yet they all have the same homologous structure. Looking at it with the trained eye, it becomes obvious all came from the same evolutionary pathway.
the dorsal fin of both dolphin and ichthyosaur is looking very similar:
Ichthyosaur - Wikipedia
and still i doesnt see any problem for evolution.
Sure, because they both swam and swimming requires stabilization against rolling. So it would be expected that both would develop the ability to stabilize against rolling, and that is efficiently done with a dorsal fin. I am no expert on anatomy, but I would predict the structure of the dorsal fin on the ichthyosaur would be quite different from the dolphin.
its a theoretical question to test evolution. we actually do find fossils in the wrong order. but as i explained- they arent falsified evolution.
Where? So far you have failed to give us an example of fossils in the wrong order.