~~¤~~~~~~~~~¤

Excerpt from &quot;Theme One: A Program of Inquiry&quot;,
By Jon Awbrey and Susan Awbrey, August 9, 1989.

| Historical Note
| 
| My old name for the logical bracket &quot;(_,...,_)&quot;,
| the text frame that parses into a 'cactus lobe',
|
|               o-...-o
|                \   /
|                 \ /
|                  @
|
| was the &quot;boundary operator&quot;.
|
| The name &quot;Study&quot; refers to the module of the Theme One Program
| that functioned as the propositional calc