ALTER-IS
  1. a composite word meaning the action of altering or changing the reality of something. Is-ness means the way it is. When someone sees it differently he is doing an alter-is; in other words, is altering the way it is. This is taken from the Axioms. (LRH Def. Notes)
  2. to introduce a change and therefore time and persistence in an as-is-ness to obtain persistency. An introduction of an alter-is is therefore the addition of a lie to the real which causes it to persist and not to blow or as-is. (HCOB 11 May 65)
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Technical Dictionary