The article isn't claiming that sexual dimorphism doesn't show up as clusters in a population. The article is claiming that the gene expression of tissues in an

The article isn't claiming that sexual dimorphism doesn't show up as clusters in a population. The article is claiming that the gene expression of tissues in an individual doesn't show strong clustering. The paper quantifies the extent to which it does (which is: not much, in humans, and a little bit in mice, but it varies a lot depending on which mice). I read these kind of comments and just cringe, because sexual dimorphism in mammals is not a hard clustering (so yes, the word "spectrum" is apt), and the projecting of cultural foibles onto unrelated scientific research leads to counterproductive discussion of the same ≈three points over and over.