 There is a ‘folk-reading’ of Leibniz that one often finds either explicitly or implicitly in the philosophy of physics literature which takes account of only some of his remarks on space and motion. For instance, the quantities captured by Earman’s (1999) ‘Leibnizian spacetime’ do not do justice to Leibniz’s view of motion (as Earman acknowledges). But it is perhaps most obvious in introductory texts (e.g., Huggett 2000). According to this view, the only quantities of motion are relative quantities, relative velocity, acceleration and so on, and all relative motions are equal, so there is no true sense of motion. However, Leibniz is explicit that other quantities are also ‘real’, and his mechanics implicitly – but obviously – depends on yet others. The length of this section is a measure, not so much of the importance of Leibniz’s actual views, but the importance of showing what the prevalent folk view leaves out regarding Leibniz’s views on the metaphysics of motion and interpretation of mechanics. (For further elaboration of the following points the reader is referred to the entry on  Leibniz’s philosophy of physics.)