cal language can be a weak' structure of thought able to investigate : "...against the certainty of reason... an anguished passion and working thought... suspended in time" [Griseri, 1967] (Figure 6). In our century Jacques Derrida has clarified better than any other intellectual how the lay-out of geometric research, in grasping the original sense of the constituent act, can succeed in expressing a new image of the world [Derrida, 1962]. In the architecture of Peter Eisenman, but also in that of Borromini or of Guarini, almost nothing remains of the hermetic exactness of geometric reasoning, but much of the geometric language shines through.IN CONCLUSION, A QUESTION MARKNo design reproduces the reality, but rather builds up a logical model in order to organize a system of relations that are either observed, hypothesized or planned. The consequent schema re-presents, according to an intentional design for its reading, the set of characteristics that are, time and time again, selected and destined to become a sign [De Rubertis, 1994]. Let us quote the following superb motivations that are basic for the theory of description and meaning inside the theory of fuzzy sets:An exact description of any real physical situation is virtually impossible. This is a fact we have had to accept and adjust to. As a result, one of the major problems in description (essential to communication,decision making, and, in a broader sense, to any human activity) is to reduce the necessary imprecision to a level of relative unimportance. We must balance the needs for exactness and simplicity, and reduce complexity without oversimplification in order to match the level of detail at each step with the problem we face. The inexactness of the description is not a liability; n the contrary, it is a blessing in the sufficient information can be conveyed with less effort. The vague description is also easier to remember. That is, inexactness makes for grater efficiency....
