id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
bracis-28398	Valeriano, Maria Gabriela; Paiva, Pedro Yuri Arbs; Kiffer, Carlos Roberto Veiga; Lorena, Ana Carolina	A Framework for Characterizing What Makes an Instance Hard to Classify	2023		.htm	text/html	6925	351	51	The purity of the footprint, which corresponds to the percentage of instances enclosed by the footprint from a given category, that is, the percentage of hard instances in the case of the hardness footprint and of easy instances in the easiness footprint. Easy instances have a low kDN value (are surrounded by elements sharing their class label), while hard instances have a high kDN value (are close to elements from the opposite class), despite the class they belong to.	cache/bracis-28398.htm	txt/bracis-28398.txt