Changes by: Aleksey Nogin (nogin at cs.caltech.edu)
Date: 2006-04-02 21:51:41 -0700 (Sun, 02 Apr 2006)
Revision: 9002
Log message:
- Forward: allow forward-chaining rules to thin the original hyp.
- Reflection: In forward-chaining rules that are "if and only if", thin the
original hyp, whenever possible.