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Metabolic pathway for AMP synthesis is too complex to have evolved (Talk.Origins)

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Response Article
This article (Metabolic pathway for AMP synthesis is too complex to have evolved (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 CB200.5:

The metabolic pathway for AMP synthesis is too complex to have evolved. It requires several intermediate steps, and it is highly improbable that all of the steps could have evolved simultaneously.


CreationWiki response:

(Talk.Origins quotes in blue)

1. Although AMP synthesis is done in several steps in modern life, several steps are not required. In fact, adenosine can and does form entirely outside of life, both in aqueous solution and in space.

So what? It does not change the fact that the metabolic pathway for AMP synthesis is Irreducibly complex.

The earliest life could have used prebiotic AMP and later have gradually developed and refined mechanisms for synthesizing AMP itself.

This is baseless speculation. It assumes that a living cell can use “prebiotic” AMP and get it in sufficient quantities, when needed. This statement is also so general as to be untestable. What Talk Origins is saying is that, as long as they can invent an untestable hypothesis, design cannot be inferred.

Irreducible complexity itself is no obstacle to evolution.

This statement is bogus; it is based on flawed logic.

This includes the impossible demand that those who hold to the position that irreducible complexity implies design disprove all possible evolutionary scenarios, even those that have not been invented yet.