 Is this a good explanation of change? One objection is that perdurance-style temporal variation is not really change at all:  the whole four-dimensional banana is neither unripe nor overripe, so can’t change between these states, and the temporal parts are either permanently unripe or permanently overripe, so they don’t change either. In response, perdurantists distinguish two ways of talking about persisting things – an atemporal way, which takes in all times at once, and a temporal way of talking, relative to various times. On the atemporal way of talking, the whole four-dimensional banana is neither unripe nor overripe; nevertheless, it’s true to say in temporal terms that the whole banana is unripe on Monday, and the whole banana is overripe on Friday, because of the properties of the relevant temporal parts. Endurantists who claim that temporal variation is not genuine change must challenge this combination of temporal and atemporal talk.