والكيف: وهو عرض لا يقتضي القسمة والنسبة، وأقسامه أربعة:
Quality is an accident that does not entail division as quantity does or relation as relationality does; it has four divisions.
Whiteness is a quality of paper; hardness is a quality of stone; knowledge is classed as a quality of a person. These do not directly state length or count.
Quality is not limited to visible color. In this traditional classification, dispositions, mental states and sensible characteristics can also fall under quality.