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The point of these paragraphs is that the work done by Broca and his people was not scientifically sound. Gould looks at all the ways in which this was the case. He looks at how Broca and his team did not look at height and how they did not look at age. He talks about how degenerative diseases can cause reductions in brain size that are independent of the reductions caused by aging. He also points out that there is a need to account for the fact that (outside of height) men tend to be bigger and that their greater physical size needs to be taken into account. In all these ways, he argues, Broca failed to account for differences in brain size that could be caused by something other than sex.
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