The acceptability of noise-modified or imperfectly inverted communication
may be best viewed as either binary or continuous. The exact nature of the acceptability
function is an empirical question to be determined for any given communication
channel. Binary acceptability occurs when a message is either acceptable
or not acceptable. Acceptability may thus occur when the message is similar to at
least a certain degree to an expected message. Acceptability may also be continuously
valued, that is, the acceptability itself can take any of a range of values from,
for example, 0 to 1, depending on how close the acceptability is to the best-case
acceptability and the worst-case acceptability