Evolution, religion, and ignorance.

[Mister Agenda]

Well then you would need to propose a mechanism by which those smaller changes are prevented from accumulating. Until then, the logical view is that small, demonstrable changes will build up, just as it's logical to consider that if I walk solidly in one direction without interruption, I will eventually have walked a mile.

First, you haven't proven that the small changes represent anything new.

When did that become a requirement? Why is it a requirement?

By the first definition, which I accept, a simple example of evolution would be that one generation has 75% brown eye genes and 25% blue eye genes, but the next generation has 74% brown eye genes and 26% blue eye genes. There is nothing new in this form of evolution, and nothing to accumulate.

Do you have a problem with blue eyes first appearing as a mutation?

Second, you haven't proven that changes go solidly in one direction.

Why should changes have to go solidly in one direction for evolution to be true?

Going back to my example, the third generation could have 75% brown eye genes and 25% blue eye genes. This would be evolution from the second generation, but it would have gone nowhere from the first generation.

So? There is no requirement in evolution that allele change accumulate in certain ways in every single generation, especially when the allele presents no special help or hindrance to reproduction.

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Whereas as macroevolution only has overwhelming evidential support.

So show it. Exlax is taking a different approach, arguing that micro must necessarily lead to macro.

Oh, and what's your definition of macroevolution?

Esquilax is correct that without a mechanism to prevent 'microevolutionary' changes from accumulating, the same mechanisms at work below the species level account for speciation.

Macroevolution is evolution above the species level leading to taxonomic divergence.

Please see one of the other current threads for an information dump on evidence for macroevolution. such as 'Can you give any evidence for Darwin's theory?'.