L-S described an inner logic in how people made categories and thought about them.
Dependability was ensured by providing a written decision trail of how the researcher made categories from raw data.
The left-hand side represents the cause for "Category", i.e. the set of circumstances that make "Category" evident and result into the consequences on the right-hand side.
"It's sort of human to make categories, it's a shorthand for behavior," said Cynthia Fuchs Epstein, a professor of sociology at the Graduate Center of the City University of New York.
Because one train tends to look very much like the next, she makes categories of such things to pass the time.
With unusual sensitivity, the World Meteorological Organisation later renumbered the system, making categories run from zero to nine, restoring cloud 9 to its former glory.
"There are philosophers of science who argue that when scientists make categories in the natural world — shapes, species — they are simply making a list of things that exist: natural kinds," Fausto-Sterling said.
Different comparable sub-categories were then assembled to make Categories.
We proceeded by starting to make categories based on our impression of the material.
For missing data on body mass index and physical activity at baseline, we created a dummy variable when making categories for these two continuous covariates.
