Because -- according to creationism -- all species were specially created at virtually the same time, and did not gradually evolve from earlier forms:
1. There should be no transitional species.I call these The Five Failed Predictions of Creationism.2. There are most certainly no pre-human (but still humanoid) species.
3. There should be no evidence, whether in fossils or DNA, showing the chronological evolution of life.
4. There must surely be at least one species, and probably several, having no genetic similarities with any other life on earth. This isn't a direct prediction, but it's inferred by the concept of special creation. There is no reason at all for each to be so similar to the others in their molecular structure. For example, there's no creationist reason why a lion can eat animals from all over the globe.
5. The fossil record must show all kinds of species (such as dinosaurs and humans) living together at the same time.
In fairness to the creationists, although the first three have already been disproved (for example: #1 -- Transitional Vertebrate Fossils FAQ, #2 -- Human Ancestors, more #2 -- Comparison of all skulls, #3 - - Tree of Life Project ), the last two (#4 and #5) can't yet be considered to be totally failed predictions. All we can do is point out that the predicted evidence has not yet been discovered. Given the lack of actual research being conducted by creationists, it is unlikely to be discovered.
I don't understand 4 and 5.
On 4, the timing of when creatures are created appears to me to have nothing whatsoever to do with their genetic code.
On 5, one could argue that if fossils from two species, such as humans and dinosaurs, were found together, that would argue against the Theory of Evolution, but I don't see how one could argue that in order for creation to be true one would have to find any possible combination of species. There are millions or species, so having any possible combination would require quadrillions of fossils.
1. Chaos made the cosmos.
2. Life should be common throughout the universe.
3. Consciousness comes from mindlessness.
4. DNA should not contain compressed design.
5. Since nature has no morality, morality is relative only for survival.