public boolean isLibrary()
	{		
		if (libVisit)
			return false; 
		
		if (library == 0 && nextCourse == Course.HUMANITIES)
			return true;
		else if (library == 1 && nextCourse == Course.MATH)
			return true;
		else if (library == 2 && nextCourse == Course.SCIENCE)
			return true;
		else
			return false;
	}