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There are barriers to large change (Talk.Origins)

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Response Article
This article (There are barriers to large change (Talk.Origins)) is a response to a rebuttal of a creationist claim published by Talk.Origins Archive under the title Index to Creationist Claims.

Claim CB902.1:

Evolutionists claim that biological evolution is extrapolated from the minor variations we observe. They ignore that there are barriers to large change.


CreationWiki response:

(Talk.Origins quotes in blue)

1. What barriers? The only barrier that anyone has ever proposed is time, and the hundreds of millions of years available for evolution show that time is not a real barrier.

Wrong! Creationists have long held that, because of the laws of thermodynamics and the principles of information theory, the variations within Created kinds only go downward, not upward. That is, the increased variation results in a loss of information within each group so that each new group is generally weaker and less fit than its ancestors.

So Creationists do have mechanisms that limit variation: they are increased entropy and increased genetic noise.

2. Evolution is not just extrapolated from observed microevolution; it is also interpolated from observed changes in the fossil record and from the pattern of observed similarities and differences between present species.

Only if one assumes evolution to begin with.