To visually represent the results of Boolean operations, it's common to use Venn diagrams and truth tables. A Venn diagram shows all possible logical relations between a finite collection of ...

Human beings have always prized friendship. As the ancient Greek philosopher Aristotle wrote: “no one would choose to live without friends,” even if they could have all other good things instead.

Aristotle Onassis was one of the most famous Greeks in the entire world in the 20th century, a visionary who became one of the richest men in modern history. Unlike most of the world’s tycoons, ...

Statistical information is often shown using graphs and other diagrams. These can be easier to read than lists of numbers.