Index Entry
Speaking operationally, lines are products of the energy interactions of two or more separate systems. The local environment is a system. A line is always formed by an alteration of the local environment by another system. ‘Lines’ are the pattern of consequence of one system altering another system, either by adding to it, or by taking away from it. The event leaves some kind of tracery, either additively, as with a vapor trail or a chalk mark, or reductively, as with a chiseled groove or a pin scratch, or as a crack opened between two parts of a formerly unit body.
