 Finally, things are the same in property when they specify features that characterize one another. Abelard offers an example to clarify this notion. A cube of marble exemplifies both whiteness and hardness; what is white is essentially the same as what is hard, since they are numerically the same concrete thing, namely the marble cube; yet the whiteness and the hardness in the marble cube clearly differ in definition—but even so, what is white is characterized by hardness (the white thing is hard), and conversely what is hard is characterized by whiteness (the hard thing is white). The properties of whiteness and hardness are “mixed” since, despite their being different in definition, each applies to the selfsame concrete thing (namely the marble cube) as such and also as it is characterized by the other.