"Actually there is plenty. Transitional fossils, genetics, physiology, etc."
They are data that only show resemblances, dear cuz. I agree that based on those data it is reasonable to draw a conclusion that one species evolved into a new one.
But since no one has ever witnessed the crossing of one species to a new one, or succeeded in creating a new species, I think it is not reasonable (ie. unscientific) to insist that conclusion can't be wrong.
