1.1 --- a/thesis/cortex.org	Fri May 02 03:34:13 2014 -0400
     1.2 +++ b/thesis/cortex.org	Fri May 02 03:39:19 2014 -0400
     1.3 @@ -3440,7 +3440,7 @@
     1.4     [[./images/draped.png]]
     1.5  
     1.6     Though this is a simple example, using the =draped?= predicate to
     1.7 -   detect the cube has interesting advantages. The =draped?= predicate
     1.8 +   detect a cube has interesting advantages. The =draped?= predicate
     1.9     describes the cube not in terms of properties that the cube has,
    1.10     but instead in terms of how the worm interacts with it physically.
    1.11     This means that the cube can still be detected even if it is not