This chapter analyses making/allowing in terms of positive/negative: you allow something to happen if an explanation of its happening requires only a negative fact about your behaviour. A negative fact about your behaviour is a highly general or uninformative one; it corresponds to almost the whole of the logical space of your possible ways of moving. An objection to this analysis, based on giving a very special status to immobility, is described and countered. The possibility space might have a different (...) metric, i.e. be structured in terms of something other than possible ways of moving. One such alternative metric is discussed. (shrink)