|The Trichotomy Property|
For any two real numbers, x and y, exactly one of these statements is true:
x > y
x = y
x < y
For example, when x = 6, and y = 8, only the third statement is true.
When x = 2, and y = 2, only the second statement is true.
When x = 8, and y = 6, only the first statement is true.