A good example is Crovitz's (1970) finding that in any scientific writing, such as the abstracts of articles published in Science, there are two kinds of words: words that might appear in any abstract (y words) and words such as substantive nouns that are specific to particular articles (x words). The ratio of x words to y words suggests how much jargon the article contains.
Furthermore, if theorists delete the x words and keep they words, they have a generic structure for theorizing. Once the content words have been removed from an argument, theorists are left with a perfectly good set of blanks into which their own nouns can be inserted. Those nouns will be put into relations with one another inde pendent of the theorists' own preferences.