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]