forum for week of 24 October: Inference to the Best Explanation

This has been fairly well addressed so far, but I'll add my two cents.

For the population example, there would be limiting factors that would hinder the exponential growth of the population over time (ie. space, resources, rates of reproduction). Similarily, there are limits on human physiology that would prevent extremely quick marathon times. Although advances in training, diet, and technology would allow times to still be improved, there would be severely diminishing returns.