public static int setSize(String set, TreeNode root) {
		String currVal;
		for(int m = 0; m< root.getRecords().size(); m++){
			currVal = root.getRecords().get(m).get(ID3.indexOfClassLabel);
			if(!possClasses.contains(currVal))
				possClasses.add(currVal);		
		}
		return possClasses.size();
	}