Many social facts, however, have no material form. Even the most "individualistic" or "subjective" phenomena, such as love, freedom, or suicide, would be regarded by Durkheim as "objective" social facts. Individuals composing society do not directly cause suicide: suicide, as a social fact, exists independently in society, and is caused by other social facts—such as rules governing behavior and group attachment—whether an individual likes it or not. Whether a person "leaves" a society does not alter the "fact" that this society will "still contain" suicides. Suicide, like other immaterial social facts, exists independently of the will of an individual, cannot be eliminated, and is as influential—coercive—as physical laws like gravity. Sociology's task therefore consists of discovering the qualities and characteristics of such social facts, which can be discovered through a quantitative or experimental approach (Durkheim extensively relied on statistics).