public boolean isIndependent(){
    	ArrayList<String> subordinatingConjunctions = new ArrayList<>();
    	subordinatingConjunctions = this.initialize(subordinatingConjunctions);
    	for(String s: clause){
    		for(String sc: subordinatingConjunctions){
    			if(s.equalsIgnoreCase(sc)){
    				return false;
    			}
    		}
    	}
    	return true;
    }