Crocoduck

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Artist's impression of a Crocoduck

The Crocoduck is a strawman argument which claims that the absence of any half-crocodile, half-duck creature disproves evolution. The argument was presented by apologists Ray Comfort and Kirk Cameron during a televised debate on the existence of God. During the debate, Kirk Cameron stated the following:

"Science has never found a genuine transitional form that is one kind of animal crossing over into another kind either living, or in the fossil record. And there's supposed to be billions of them! Now, what I am about to show you does not exist. These were actually created by our graphic artists. But, I want you to keep your eye out for this because this is what evolutionists have been searching for for hundreds of years. Alright? And if you find one of these, you could become rich and famous."

Shorty after he unveiled three imaginary composite pictures depicting a crocoduck (half-crocodile, half-duck), the bullfrog (half-bull, half-frog) and the sheepdog (half-sheep, half-dog).

Counter-apologetics

This fallacy doesn't need much explaining: the theory of evolution does not state that a crocodile has to become a duck, or vice-versa, or that such a thing must have happened for evolution to be correct. Even if a duck were supposed to have evolved directly into a crocodile, nothing says that a duck would have a crocodile head aside from the Photoshopped picture at right.

An intermediate form between a duck and a crocodile is not to be expected because birds and crocodiles are only distantly related. Birds evolved out of an animal similar to Xiaotingia and Archaeopteryx while crocodiles evolved out of different types of reptiles called archaeosaurs more than 50 million years earlier, see Crocodile evolution. Intermediate fossil forms between the birds and their ancestors have been found as have intermediate fossils between the crocodiles and their different ancestors.

The Crocoduck fallacy demonstrates the complete lack of understanding of Comfort and Cameron regarding biological evolution. They apparently believe that Darwinian evolution requires a direct, single-step ancestor between every two species on the planet. In other words, there must have been not only a crocoduck, but also a croco-beaver and a beaver-duck predating the crocodile, beaver, and duck.

See also


v · d Science
v · d General science
Scientific method   Scientific theory · Hypothesis · Evidence · Examining claims · Skepticism
Scientific Disciplines   Physics · Biology · Chemistry · Psychology · Medical Science · Mathematics
History of science   Heliocentrism · Quantum mechanics
Champions of reason   Carl Sagan · James Randi
v · d Biology
Evolution   Natural selection
Abiogenesis   The Urey-Miller experiment
Evolutionary straw men   Life just exploded from nothing · So you think we came from monkeys · How did the first dog find a mate · Crocoducks · Banana argument · 747 Junkyard argument · Irreducible complexity · Chuck Missler's jar of peanut butter · What good is half a wing?
Notable Biologists   Charles Darwin · Richard Dawkins · PZ Myers
Notable quacks   William Dembski · Michael Behe · Geoffrey Simmons · Ken Ham · Michael Cremo
v · d Physics
Concepts   Cosmology · Big bang · Relativity theory · Black holes · Quantum mechanics
Physics straw men   Fine-tuning argument · Anthropic principle
Notable Physicists   Isaac Newton · Albert Einstein · Richard Feynman · Stephen Hawking
Notable Quacks   Dinesh D'Souza · Ray Comfort
v · d Mathematics
Statistics   Sample size · Selection bias · Data mining · Standard divination · Statistical significance · Statistical probability · Meta probability · Gambler's fallacy
Mathematics and religion   Biblical value of pi
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