Post Hoc Ergo Propter Hoc.
- Intelligence is needed to design something.
- The universe appears designed.
- Therefore an intelligence must have designed it.
Premise 2 is an assertion with no basis in fact. There is also no reason to accept that because we perceive things to be designed and can track those things back to intelligent design as in cars and computers, that anything that we perceive to have a design was therefore intelligently designed such as cell structures, the Earth's atmosphere, or quasars. Because we have a perception of intelligent design with these things does not mean therefore that an intelligent designer designed them.
This is often then buttressed with begging the question:
- You cannot disprove that the universe was intelligently designed.
- Therefore it must have been designed.
Not only is this patently unscientific since it betrays the very nature of theorizing, it is not very good engineering practice either since engineering demands that models be tested before they are used. That would be like saying, you cannot disprove that the space shuttle can support life in space, so we should send someone up in it.
Complexity is often used as an objection here. Things that are so complex must have been designed. But there is no way to even demonstrate that the probability of a fine tuned universe needs to have a designer. So what if the probability of a random fluctuation that caused the inflationary period was infinitesimally small. No matter how small the probability, it does not conclude that an intelligent designer is a necessary condition for that probability to occur. It does not matter if the probability seems absurd.
Say a referee places a football a millimeter from the goal line on first down. The team now has four ties to get the ball into the end-zone for a score to win the Superbowl. They try once and fall half that distance short. They try a second time and half that distance. They give it another try and half that distance. On the final try they half the distance once more. The tip of the ball is less than a hair's width from touching the goal line to win the Superbowl. Even though it is not there, the referee calls it a Touchdown and they win the game. The reality is that the probability they would get so close to the goal line without scoring is unbelievably small. But that does not mean that the right judgment is therefore to give them the score because they got so close and the probability that they could have run such a series of plays with such a result was too unbelievable. That's when the play would get sent up to the replay official with the super high definition TV. That referee would have to overrule the call and deny them their victory because the observable evidence did not justify a touchdown.
The argument from engineering as a justification for intelligent design is therefore false.
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