Yet another instance of hackerdom' s peculiar ATtraction to mystical references - a common humorous way of making exclusive stATements about a class of things. The templATe is from the "Tao te Ching": "The Tao which can be spoken of is not the true Tao." The implicATion is often thAT the X is a mystery accessible only to the enlightened. See the trampoline entry for an example, and compare {has the X nATure}. [Jargon File]