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The most commonly used examples of irreducibly complex biological systems are the human compound eye, the [[blood clotting cascade]], and the bacterial [[flagellum]]. Kenneth R. Miller describes hypothetical precursors to the flagellum's being used as ionic channels within [[bacteria]], known as the ''Type III Secretory System''.<ref>[http://www.millerandlevine.com/km/evol/design2/article.html The Flagellum Unspun]</ref>  However, Professor Behe counters that Miller's criticism of his work is flawed. <ref>http://www.arn.org/docs/behe/mb_trueacidtest.htm</ref>  Critics, including biology professor John McDonald, have countered Behe's toy model, the mouse trap, used to illustrate the concept. McDonald produced examples of how he considered the mousetrap to be "easy to reduce", eventually to a single part.<ref name=trap>[http://udel.edu/~mcdonald/mousetrap.html A reducibly complex mousetrap] (graphics-intensive, requires [[JavaScript]])</ref> <!--Critics consider that most, or all, of the examples were based on misunderstandings of the workings of the biological systems in question, and consider the low quality of these examples excellent evidence for the argument from ignorance.-->However, Professor Behe disputes the criticism of John McDonald. <ref>http://www.arn.org/docs/behe/mb_mousetrapdefended.htm</ref>

The most commonly used examples of irreducibly complex biological systems are the human compound eye, the [[blood clotting cascade]], and the bacterial [[flagellum]]. Kenneth R. Miller describes hypothetical precursors to the flagellum's being used as ionic channels within [[bacteria]], known as the ''Type III Secretory System''.<ref>[http://www.millerandlevine.com/km/evol/design2/article.html The Flagellum Unspun]</ref>  However, Professor Behe counters that Miller's criticism of his work is flawed. <ref>http://www.arn.org/docs/behe/mb_trueacidtest.htm</ref>  Critics, including biology professor John McDonald, have countered Behe's toy model, the mouse trap, used to illustrate the concept. McDonald produced examples of how he considered the mousetrap to be "easy to reduce", eventually to a single part.<ref name=trap>[http://udel.edu/~mcdonald/mousetrap.html A reducibly complex mousetrap] (graphics-intensive, requires [[JavaScript]])</ref> <!--Critics consider that most, or all, of the examples were based on misunderstandings of the workings of the biological systems in question, and consider the low quality of these examples excellent evidence for the argument from ignorance.-->However, Professor Behe disputes the criticism of John McDonald. <ref>http://www.arn.org/docs/behe/mb_mousetrapdefended.htm</ref>

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