Take for example the evolutionist claim that the inner-ear bones of a mammal evolved from one of the bones in a reptile’s jaw. No one has ever observed such a transformation. In fact, no one has ever observed any bone from any animal evolving into a differently-shaped bone in a totally different animal. Moreover, no observation anywhere anytime suggests that such a metamorphosis is even possible. And no one can prove that such a thing is possble.
So the claim that the inner-ear bones of a mammal evolved from one of the bones in a reptile’s jaw is 100% ASSUMPTION and SPECULATION. In evolution “science”, such speculations and assumptions are de rigueur; they’re everywhere. In fact, the theory that all life on earth evolved from microbes is completely dependant on such assumptions and speculations.
So, your statement that “the study of evolution … is based solely on observations” is clearly a nonsense. The truth is, the study of evolution is based on countless imaginary events that have never been observed.