Chance music makes a complete break with traditional values in music, and asserts that one sound or ordering of sounds is as meaningful as another.

This is a true statement. The music, when composed, is typically not created with any set order or idea in mind. The notes can even be ordered in any way or can be changed up as the performer wishes. Many times, the piece is composed by simply use a random method for selecting the notes (rolling a die, tossing a coin, etc.).