I92 THE HUMANITY OF WORDS
A conjunctive sectional pattern is closed when no other major parts may be added.
The usefulness o the conjunctive sectional pattern is already apparent. We have used it in connection with Collision ca. 1500 B.C. and collision ca. yoo B.C.; we have used it in connection with The nebular theory and the planetesimal theory. In each case the sections are relatively independent of each other.
There is no cohesiveness between the parts of a sectional pattern in the sense that time and space hang together. The communicator must, therefore, establish a principle of organization to hold the parts together. You may ask, and rightly at this point, If we must find some way of establishing cohesiveness between the relatively independent parts of the sectional pattern, why take the trouble to designate the pattern as sectional at alii The answer is this. When parts are relatively independent of each other, it is, frequently, important to consider them independently and not conjointly with other parts. Analysis and evaluation are much sharper when contexts are delimited in scope. But there is yet another advantage. In a history lesson at Wells High School, for instance, the title of a chapter was, The Economic and Political Causes of the American Revolution. This chapter fell into two parts. After the lesson was covered, a pertinent question was Does this chapter take the form of an open or a closed sectional pattern? This is the same as asking the question Were those the only causes of the American Revolution? If not, what other possible causes may be considered? And this is always a pertinent question when two or more sections are considered. Are there any other aspects which rightly belong in that frame of reference? A sectional argument, exposition, etc., may be very