# n-message

A message singling out one thing from a set of $$n$$ is sometimes called an $$n$$-message. For example, a message singling out one thing from a set of 13 is a 13-message. An $$n$$-message carries $$\log_2(n)$$ bits of information. For a formal account of what it means for a message to “single out one thing from a set of $$n$$,” see Information.