High school math standards are broken into conceptual categories that allow schools to create unique courses of study. (rossieronline.usc.edu)
The same conceptual categories and presuppositions proved to be powerful tools in many fields, from astronomy to chemistry and biology. (religion-online.org)
Admittedly, one ought not judge a movement by its jokes, but neither should one be overly patient with those who delight in their own ignorance of elementary conceptual categories. (firstthings.com)