public interface ProblemSpecAndTools {
	
	// Classes implementing this interface should include sufficient 
	// instance variables to completely specify a problem/task whose output
	// can be accomplished via tail recursion and an accumulator.
	
	void updateAccumulatorBaseCase();
	
	void updateAccumulatorNonBaseCase();
	
	boolean isBaseCase();
	
	void reduceProblem();
	
	Object accumulator();

}