docs: public double getAnomalyScore(Instance inst)
  	{
  		if(this.neighbourhood.size() < 2)
  			return 1.0;
  		
  		Instance nearestNeighbour = getNearestNeighbour(inst, this.neighbourhood, false);
  		Instance nnNearestNeighbour = getNearestNeighbour(nearestNeighbour, this.neighbourhood, true);
  		
  		double indicatorArgument = distance(inst, nearestNeighbour) / distance(nearestNeighbour, nnNearestNeighbour);
  				
  		return indicatorArgument;
  	}