 The Manual of Reason says that space is ‘ubiquitous’ (vibhu), which it defines as ‘being in contact with every sample of earth, air, fire, water (and ‘mind’) (TS14). This raises the question: is space infinite in dimension, or the same size as the cosmos? If space is defined in terms of the relations between physical objects, then it would seem to have the same size as the cosmos. There are however Vaiśeṣika arguments that it is infinite. The Vaiśeṣikas say that most bodies are either ‘long’ (dīrgha) or ‘short’ (hrasva) in dimension (TS25, Bhaduri 1947: 118), but that a body’s having ‘long’ or ‘short’ dimension is unintelligible unless it has bounding, perimeter parts. Space, however, has no parts and hence no boundary. Some Vaiśeṣikas conclude that space has no finite dimension (i.e. is infinite); others that it has a special dimension called ‘paramadīrgha’ or ‘maximal length’.