# Common Descent: Humans and Chimps / Mice and Rats

**URL:** <https://discourse.peacefulscience.org/t/common-descent-humans-and-chimps-mice-and-rats/106>\
**Category:** Conversation\
**Created:** [April 5, 2018, 9:33pm UTC](https://discourse.peacefulscience.org/t/common-descent-humans-and-chimps-mice-and-rats/106 "2018-04-05T21:33:44Z")\
**Posts on this page:** 1\
**Showing post:** 15

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**Author:** ![scd](https://avatars.discourse-cdn.com/v4/letter/s/6f9a4e/32.png) [@scd](https://discourse.peacefulscience.org/u/scd)\
**Post date:** [April 8, 2018, 1:06pm UTC](https://discourse.peacefulscience.org/t/common-descent-humans-and-chimps-mice-and-rats/106/15 "2018-04-08T13:06:09Z")

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> [@Molecular Genetics of Whale Evolution](https://discourse.peacefulscience.org/t/molecular-genetics-of-whale-evolution/83/89):
>
> This depends on what you are calling “evolution”

i referring to a change at the family level in most cases. dogs and cats for instance.

> [@Molecular Genetics of Whale Evolution](https://discourse.peacefulscience.org/t/molecular-genetics-of-whale-evolution/83/89):
>
> How do you explain Michael Behe’s acceptance of human/chimp common ancestry if ic systems are such a big problem?

indeed some id scientists accept common descent. but they still reject natural cause for some biological systems like flagellum or a complex protein.

> [@Molecular Genetics of Whale Evolution](https://discourse.peacefulscience.org/t/molecular-genetics-of-whale-evolution/83/89):
>
> but you might consider exactly what parts of the theory you are referring to

see above. we cant test for instance the claim that dog and banana share a common descent.

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