Strengths and weaknesses of evolution

Scientists are always probing the strengths and weakness of their hypotheses. That is the very nature of the enterprise. But evolution is no longer a hypothesis. It is a theory rigorously supported by abundant evidence. The weaknesses that creationists hope to teach as a way of refuting evolution are themselves antiquated, long since filed away as solved. The religious faith underlying creationism has a place, in church and social studies courses. Science belongs in science classrooms.

— The Cons of Creationism, editorial from The New York Times

"Strengths and weaknesses of evolution" is a controversial phrase that has been proposed for, and in Texas introduced into, public school science curricula. Those proposing the phrase purport that there are weaknesses in the Theory of Evolution that should be taught for a balanced treatment of that subject. The scientific community rejects that any substantive weaknesses exist, and further views the examples that have been given in support of the phrasing as being without merit and long refuted. This has led many critics, experts and observers to conclude that it is creationist code-language, in an attempt to introduce supernatural explanations into science courses.

According to the National Center for Science Education, the phrase, like 'Teach the controversy' and 'Critical Analysis of Evolution', is merely another attempt by intelligent design creationists to encourage educators to teach fallacious information -- that a 'controversy' exists among scientists over whether evolution has occurred and the long-discredited 'weaknesses of evolution'.

In late 2008, it became a highly publicized issue as the Texas State Board of Education (SBOE) held public hearings on whether this language should be removed from the curriculum.

History

In 2003 and 2004, creationist lawyer Larry Caldwell sought to persuade the Roseville Joint Union High School District Board of Trustees to adopt a policy which included teaching "the scientific strengths and weaknesses" of evolution. When this was rejected, he filed a complaint in federal court against the district, alleging that his civil rights were violated during the controversy, resulting in a summary judgment against him in September 2007.

In February 2008 the Discovery Institute created an Academic Freedom petition that stated "Teachers should be protected from being fired, harassed, intimidated, or discriminated against for objectively presenting the scientific strengths and weaknesses of Darwinian theory."

Texas SBOE

The "strengths and weaknesses" language was included in the curriculum standards in Texas to appease creationists when the SBOE first mandated the teaching of evolution in the late 1980s.

In 2003, the "strengths and weaknesses" language in the standards was employed by members of the board in an unsuccessful attempt to dilute the treatment of evolution in the biology textbooks they were considering.

In September 2008 the 21st Century Science Coalition released a petition to remove the phrase "strengths and weaknesses" from the public school guidelines for science classrooms in Texas. As of November 2008, 588 scientists at Texas universities and 777 other scientists across the state have signed the petition.

In the summer of 2008/2009 the Texas SBOE is determining the curriculum for the next decade, including deciding whether the "strengths and weaknesses" of evolution should be taught. While this language was described by the New York Times as a "benign-sounding phrase", they mention that critics state that it is a new strategy to undermine the teaching of evolution, and for students to hear religious objections under the heading of scientific discourse. The SBOE Chairman, Don McLeroy, a Young Earth creationist dentist from Central Texas, denied that the language "is subterfuge for bringing in creationism." McLeroy views the debate as being between "two systems of science" — "a creationist system and a naturalist system". These view have alarmed Texas educators, including former chairman of the department of medicine at the University of Texas Southwestern Medical Center at Dallas Dan Foster, who stated that "[s]erious students will not come to study in our universities if Texas is labeled scientifically backward".

In December 2008, the San Antonio Express-News stated in an editorial that the Texas SBOE has a "long history of trying to water down the science curriculum with criticisms of evolution that lack scientific credibility."

The lesson we draw from these shenanigans is that scientifically illiterate boards of education should leave the curriculum to educators and scientists who know what constitutes a sound education.

— Texas Two-Step, editorial from The New York Times condemning the amendments

In January 2009, the Texas SBOE voted to remove the 'Strengths and Weaknesses" language, but its conservative faction, led by Don McLeroy, managed to pass several amendments to the science curriculum that opponents describe as opening the door to teaching objections to evolution that might lead students to reject it. These included one ammendent that compels science teachers to teach about aspects of the fossil record that does not neatly fit with gradualism, but rather show the relatively sudden appearance of some species while others seem to remain unchanged for millions of years. Prominent University of Texas biology professor David Hillis described the amendments as "mak[ing] no sense to me ... It's a clear indication that the chairman of the state school board doesn’t understand the science." Board member Ken Mercer, who voted to keep "strengths and weaknesses" described his support for the language in explicitly religious terms: "It's an issue of freedom of religion." This view was contradicted by fellow social conservative board member Barbara Cargill, who stated "[t]his isn’t about religion."

Educational and scientific value

See also: Creation and evolution in public education‎

While anti-evolution members of the Texas SBOE have claimed their "weaknesses" campaign has nothing to do with faith, that "We're not putting religion in books", scientists have rebutted that these weaknesses are simply falsehoods. Scientists testified at the state board hearing in November 2008 that evolution is a scientific theory, not a hypothesis and thus does not have weaknesses.

Some scientists, including University of Texas biochemistry professor Andrew Ellington and Houston Independent School District's AP science lead teacher Robert Dennison, are concerned that the mention of "weaknesses" in the curriculum standards has had a chilling effect on science teachers.

In a survey commissioned by the Texas Freedom Network, "94% of Texas scientists indicated that claimed "weaknesses" are not valid scientific objections to evolution (with 87% saying that they “strongly disagree” that such weaknesses should be considered valid)."

Specific weaknesses and their scientific rebuttals

Main article: Objections to evolution

Supporters of the 'strengths and weaknesses of evolution' language have proposed the following as weaknesses of evolution, and the scientific community has responded with the following rebuttals:

Argument	Scientific rebuttal
Evolution violates the first law of thermodynamics	"Formation of the universe from nothing need not violate conservation of energy. The gravitational potential energy of a gravitational field is a negative energy. When all the gravitational potential energy is added to all the other energy in the universe, it might sum to zero"
Evolution violates the second law of thermodynamics	Evolution and the second law of thermodynamics Further information: [[:Entropy and life]]
Evolution violates the Law of Biogenesis	Pasteur's law only disproved the (then current) idea that life forms such as mice, maggots, and bacteria can appear fully formed. It does not say that very primitive life cannot form from increasingly complex molecules.
Evolution is unable to explain the Cambrian Explosion	How real was the explosion? Possible causes of the “explosion”
Alleged frauds and forgeries such as Piltdown Man and Haeckel's embryo drawings	Rebuttal of allegations that past evidence for evolution has been overturned Further information: [[:Icons of Evolution]]
Evolution is not observable	Observability of evolution
Evolution is only a theory and not a fact	Evolution is both a theory and a fact.

See also

• Academic Freedom bills
• Christine Comer
• Critical Analysis of Evolution
• Free Speech on Evolution
• Intelligent design in politics
• Neo-creationism
• Stand up for science
• Teach the controversy

Further reading

• Index to Creationist Claims, TalkOrigins Archive
• Spontaneous Generation and the Origin of Life, John S. Wilkins

External links

• Archived Audio Files of Texas SBOE meetings
• Transcipt (and link to audio file) of a lecture given by Texas SBOE Chairman Don McLeroy on Evolution and Creationism