"The semantic field of the word "space" and the construction of this concept in mathematics are called upon to underscore that individual experience is irreducible to a geometrical-space. The latter owes its increasing ascendency to the built environment's mode of production and more generally to the destruction of those relationships and references that are not determined by the predominant mode of production. The writer, a practitioner of development himself, fears that social sciences participate in this attempt. He should like each discipline to make its specific mode of reduction explicit, and to take into account the diversity of the practices of apace, as well as the role of language in constituting representations and in the symboli cal atructuration of the environment. With regard to an intervention on apace, the formula "space is what goes on in it and what may he said about it" maintains the problematical nature of design."