I poop therefore I know I am not the product of intelligent design.
An argument often put forth by believers in creationism is that if evolution is true, there should be no apes. Unfortunately the truth is twisted when this argument is used, because nobody said humans evolved from apes directly. Scientists agree that humans evolved from an ape-like creature, as did Neanderthals who have since died out. Apes are still alive because they evolved along their own line.
If we were the product of intelligent design, why do we eat and poop? Clearly these are not intelligent functions. An intelligent design would not die, we would not need to reproduce, we would not need to consume other intelligently designed beings, and would not produce waste.
Image via Wikipedia
The very notion of sexual reproduction allows for a mixing of genes, it encourages evolution. It allows for variation, with the better variations surviving and reproducing, the weaker ones dying off. When we look at the skeletons of other animals we can see they are very similar to our own, one bone longer here, one shorter there. With so much in common with the rest of the animal kingdom, we obviously came from one source, an intelligent design would have more variety, like how a computer resembles nothing of a car, pencil, or boat.
In humans we have almost eliminated natural selection because most societies preserve their weaker members, who in wild animals would have been killed, or died. We even allow them to reproduce.
In the wild when inferior, or different, animals are born they are often killed off by their parents, or left to die. Occasionally though they will survive, having an advantage to the others and will reproduce, passing that trait on. Eventually their offspring are able to out compete the original version of the animal and they soon out number the original, perhaps becoming more and more evolved and distinct over time.
If dogs evolved from wolves, why do we still have wolves?
This question, is again, a twist of facts. All domestic dogs descended from wolves, but they did so with human intervention. You will not see a pair of wolves give birth to dalmatians. Thousands of years ago wolves started hanging around with people, this was to their mutual advantage.
Over time the people kept the friendlier puppies and either ate or got rid of the others. They selected dogs that exhibited certain traits. Pups who were born with mutations, such as different colors, sizes, or fur types, would have been killed in the wild, but were kept by people. As humans developed agriculture and started keeping other species of animal, dogs were selected who were good at herding or guarding. Even smaller dogs were eventually considered valuable to keep beds warm at night.
We still have wolves because wolves live in the wild and are not in direct competition with dogs.
Compare this to the natural evolution of the horse. Horses were once tiny creatures, they had multiple toes and stood only 8 or 9 inches tall. Called “Dawn-Horses” these small creatures gradually mutated with the larger members surviving, and the smaller ones not. A few other changes occurred too, four toes on each front foot gradually became one solid hoof on each foot. Being larger was a survival advantage, they were better able to see a predator, better able to run from it, or kick it.
The above photo is of Eohippus, or Dawn Horse.
The giraffe is often sighted as an example of how evolution is misunderstood. Some people think the giraffe consciously grew a longer neck in an effort to reach food on taller trees. Giraffes did not grow longer necks to reach tall plants, the animals who had longer necks survived because they were able to reach more food, thus the shorter necked animals died off and did not reproduce. An interesting note, the neck of the giraffe has just as many vertebrae as the neck of a human. Giraffes were simply lucky to have had a beneficial mutation occur.
Were these all products of intelligent design, trees would be short enough for everyone to eat, or would not need to be eaten at all. Perhaps it is the water, the rocks, and the wind which are part of an intelligent design, with everything else being random occurrences. I poop, therefore I know I am not the product of an intelligent design.