[GodGunsGuts]

==First, this isn’t really Lamarckism. Lamarckism was a competing theory to Darwinian evolution based on heritability of acquired characteristics.

I suggest YOU go back and READ THE ARTICLE AGAIN. That’s exactly what the article is talking about. They changed the diet of the agouti mice which produced a mutation that was inherited by their offspring. Thus, by your own criteria, Neo-Darwinism is falsified.

==DNA and Mendialian genetics were unknown when this (Lamarckian) theory was popular, so it seemed reasonable

They were also unknown during Darwin’s time. The researchers studying DIRECTED MUTATION have just as much right to these discoveries as the researches who study random mutation.

[UndauntedR]

They changed the diet of the agouti mice which produced a mutation that was inherited by their offspring.

Precisely (except for the mutation part again). In this case, a differential in gene expression is cause by the environment, the reason for it being an interesting result. Epigenetic inheritance is not doubted (as countless experiments have validated it) and can have environmental causes (hence the appeal to Lamarckism). Even though most biologists view epigenetic inheritence as another form of phenotypic plasticity... and not a primary mechanism of evolutionary novelty.

I asked for an animal whose offspring differed from it in a way unattributable to genetic variance. Obviously this example doesn't satisfy these requirements. I mentioned Lamarckism because in historical context it requires active mechanisms rather than evolution's passive mechanisms. For example, a giraffe's "desire" to have a longer neck does not cause it to have a long neck. I'll be more precise in the future. Regardless, all you've shown, and seem to be arguing for, is that a natural cause has a natural effect.

For further information in your "directed mutation" idea, I would look up phenotypic plasticity, which deals with phenotypic adaptations in individuals in response to the environment. It is well studied and I'm sure you can find numerous examples.