1. Argument from Irreducible Complexity
Complex interdependent systems, like eyes or blood clotting, cannot evolve all at once. They must have been designed.
C.S. Lewis, British writer and lay-theologian, 1898-1963
“Reality, in fact, is usually something you could not have guessed. That is one of the reasons I believe Christianity. It is a religion you could not have guessed. If it offered us just the kind of universe we had always expected, I should feel we were making it up. But, in fact, it is not the sort of thing anyone would have made up. It has just that queer twist about it that real things have.”
— C.S. Lewis, Mere Christianity (1952), The C.S. Lewis Signature Classics, HarperOne, 2017 p43
Allan Sandage, American astronomer, 1926-2010
“The world is too complicated in all its parts and interconnections to be due to chance alone. I am convinced that the existence of life with all its order in each of its organisms is simply too well put together. Each part of a living thing depends on all its other parts to function. How does each part know? How is each part specified at conception? The more one learns of biochemistry the more unbelievable it becomes unless there is some type of organizing principle–an architect for believers, a mystery to be solved by science (even as to why) sometime in the indefinite future for materialist reductionalists.”
— Allan Sandage, “A Scientist Reflects on Religious Belief,” Truth: An Interdisciplinary Journal of Christian Thought, vol. 1, 1985 (Quoted on p229-230 of Lee Strobel’s A Case for a Creator)
Stephen C. Meyer, PhD, American philosopher, 1958-
“Then there’s the evidence for design in molecular machines that defy explanation by Darwinian natural selection. These integrative, complex systems in biological organisms–which microbiologists Michael Behe calls ‘irreducibly complex’–include signal transduction circuits, sophisticated motors, and all kinds of biological circuitry.
“You see, these biological machines need all of their various parts in order to function. But how could you ever build such a system by a Darwinian process of natural selection acting on random variations? Natural selection only preserves things that perform a function–in other words, which help the organism survive to the next generation. That’s survival of the fittest.
“The problem with irreducibly complex systems is that they perform no function until all the parts are present and working together in close coordination with one another. So natural selection cannot help you build such systems; it can only preserve them once they’ve been built. And it’s virtually impossible for evolution to take such a huge leap by mere chance to create the whole system at once.
“Of course, this forces the question: how did the biochemical machine arise? Behe says maybe these biological systems look designed because they really were designed. After all, whenever we see irreducibly complex systems and we know how they arose, invariably a designer was the cause.”
— Stephen C. Meyer, PhD (quoted by Lee Strobel), A Case for a Creator, Zondervan, 2004 p83
Michael J. Behe, PhD, American biochemist, 1952-
“Now we’ve probed to the bottom of life, so to speak–we’re at the level of molecules–and there’s complexity all the way down. We’ve learned the cell is horrendously complicated, and that it’s actually run by micromachines of the right shape, the right strength, and the right interactions. The existence of these machines challenges a test that Darwin himself provided...
“You see, a system or device is irreducibly complex if it has a number of different components that all work together to accomplish the task of the system, and if you were to remove one of the components, the system would no longer function. An irreducibly complex system is highly unlikely to be built piece-by-piece through Darwinian processes, because the system has to be fully present in order for it to function. The illustration I like to use is a mousetrap
“First, there’s a flat wooden platform to which the other parts are attached. Second, there’s a metal hammer, which does the job of crushing the mouse. Third, there’s a spring with extended ends to press against the platform and the hammer when the trap is charged. Fourth, there’s a catch that releases when a mouse applies a slight bit of pressure. And, fifth, there’s a metal bar that connects to the catch and holds the hammer back when the trap is charged.
“Now, if you take away any of these parts–the spring of the holding bar or whatever–then it’s not like the mousetrap becomes half as efficient as it used to be or it only catches half as many mice. Instead, it doesn’t catch any mice. It’s broken. It doesn’t work at all...
“An intelligent agent [matches all the parts properly] for a mousetrap. But in the cell, who tells the parts where they should go? Who staples them together? Nobody–they have to do it on their own. You have to have the information resident in the system to tell the components to get together in the right orientation, otherwise it’s useless.
“So the mousetrap does a good job of illustrating how irreducibly complex biological systems defy a Darwinian explanation. Evolution can't produce an irreducibly complex biological machine suddenly, all at once, because it’s much too complicated. The odds against that would be prohibitive. And you can’t produce it directly by numerous, successive, slight modifications of a precursor system, because any precursor system would be missing a part and consequently couldn’t function. There would be no reason for it to exist. And natural selection chooses systems that are already working...
“You can’t absolutely rule out all theoretical possibilities of a gradual, circuitous route. But the more complex the interacting system, the far less likely an indirect route can account for it. And as we discover more and more of these irreducibly complex biological systems, we can be more and more confident that we’ve met Darwin’s criterion of failure...
“In other words, if you just had the components themselves without the ability to bring the other pieces into position, you’d be far from having a functioning mousetrap. Nobody ever addresses this problem in the evolutionary literature. If you do any calculations about how likely this could occur by itself, you find it’s very improbable. Even with small machines, you wouldn’t expect them to self-assemble during the entire lifetime of the earth. That’s a severe problem that evolutionists don’t like to address.”
— Michael J. Behe, PhD (quoted by Lee Strobel), A Case for a Creator, Zondervan, 2004 p208-213
“Cilia are whip like hairs on the surface of cells. If the cell is stationary, the cilia move fluid across the cell’s surface...
“But my point is that these three parts [within the cilia]–the rods, linkers, and motors–are necessary to covert a sliding motion into a bending motion so the cilium can move. If it weren’t for the linkers, everything would fall apart when the sliding motion began. If it weren’t for the motor protein, it wouldn't move at all. If it weren’t for the rods, there would be nothing to move. So like the mousetrap, the cilium is irreducibly complex.
“[Darwinism can’t account for that.] You only get the motion of the cilium when you’ve got everything together. None of the individual parts can do the trick by themselves. You need them all in place. For evolution to account for that, you would have to imagine how this could develop gradually–but nobody has been able to do that.”
— Michael J. Behe, PhD (quoted by Lee Strobel), A Case for a Creator, Zondervan, 2004 p213-214
“Right now, there’s only one principle that we know can come up with complex interactive systems, and that’s intelligence. Natural selection has been proposed, but there’s little or no evidence backing that claim. Some people had high hopes for self-organizational properties or complexity theory, but there’s no evidence that these can explain something as complicated as the cell. The only force known to be able to make irreducibly complex machines is intelligent design.
“So scientists are in the curious position of ignoring something they know to be capable of explaining what they see in biology, in favor of phantom or totally unproven explanations. Why ignore intelligent design when it’s a good match to the data? Yes, we have to keep an open mind in science, but we shouldn't be ignoring the most obvious explanation for all the evidence we have today.”
— Michael J. Behe, PhD (quoted by Lee Strobel), A Case for a Creator, Zondervan, 2004 p226
REBUTTAL ARGUMENTS