Evolutionists have long pointed out that there are theoretical discoveries, that if made, would invalidate evolution and force a new theory. The classic example is finding a fossil in the wrong geological layer without any probable reason why it should be there. (Aside: This is a major prediction that young earth creationism makes but has not been shown since all "kinds" were alive at all times.) For instance, finding a set of hominid remains with a set of dinosaur remains. So my question is, what would change your mind? What potential discovery would change your mind and accept the opposite viewpoint? This is meant as an opportunity for evolutionists to show additional examples than what I have provided of things that would incontrovertibly disprove evolution and for YECs to give examples of legitimate scientific* discoveries that they would accept as "proof" of evolution and an old earth. *I phrase it this way because I do not want us to waste our time with nonsensical answers like "If we were to find complete skeletons of every intermediate that ever lived" or "If we were to observe a dog evolve into a cat while we observe." No one here argues for a strawman of evolution.