16.1.9	 The Boolean Operator ==
- V is definitely assigned after a ==b when true iff at least one of the following is true:
- V is definitely assigned after b.
- V is definitely assigned after a when true and V is definitely assigned after b when false.
- V is definitely assigned after a when false and V is definitely assigned after b when true.
 
- V is definitely assigned after a ==b when false iff at least one of the following is true:
- V is definitely assigned after b.
- V is definitely assigned after a when true and V is definitely assigned after b when true.
- V is definitely assigned after a when false and V is definitely assigned after b when false.
 
- V is definitely assigned before a iff V is definitely assigned before a ==b.
- V is definitely assigned before b iff V is definitely assigned after a.