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In the context of Venn diagrams, the universe is not everything, but everything you're dealing with right now. Let's deal with the following list of things: moles, swans, rabid skunks, geese, worms, horses, Edmontosorum (a variety of duck-billed dinosaurs), platypusses, and a very fat cat.
Here are four very important points that emerge from consideration of the diagram in Figure 3 and earlier material presented in this section: 1  Mathematics is an aid to representing and attempting to resolve problem situations in all disciplines. It is an interdisciplinary tool and language.