code: public double score(Instance inst, int sizeLimit)
  	{
  		double anomalyScore = 0.0;
  		
  		if(this.internalNode && this.r > sizeLimit)
  		{
  			if(inst.value(this.splitAttribute) > this.splitValue)
  				anomalyScore = right.score(inst, sizeLimit);
  			else
  				anomalyScore = left.score(inst, sizeLimit);
  		}
  		else
  		{
  			anomalyScore = this.r * Math.pow(2.0, this.depth);
  		}
  		
  		return anomalyScore;
  	}
docs: If this node is a leaf node or it has a mass profile of less than sizeLimit, this returns the anomaly score for the argument instance.
  Otherwise this node determines which of its subordinate nodes the argument instance belongs to and asks it provide the anomaly score.
  
  @param inst the instance being passed through the tree
  @param sizeLimit the minimum mass profile for a node to calculate the argument instance's anomaly score
  
  @return the argument instance's anomaly score (r * 2^depth)