 Many terms have been used to describe what we mean by dispositions: ‘power’ (Locke’s term), ‘dunamis’ (Aristotle’s term), ‘ability’, ‘potency’, ‘capability’, ‘tendency’, ‘potentiality’, ‘proclivity’, ‘capacity’, and so forth. In a very general sense, they mean disposition, or otherwise something close by. To avoid confusion, however, we will stick to the term ‘disposition’ (for a subtle difference between dispositions and powers, see Bird 2016).