Article de Georges-A. Legault Professeur de philosophie,
L'auteur cherche à rassembler la personnalité complexe de Bertrand
Russell sous le vocable de sceptique, entendu en un sens positif.
Bertrand Russell referred to several
different definitions and philosophical analyses as providing "logical
constructions" of certain entities and expressions. Examples he
cited were the Frege/Russell definition of numbers as classes of
equinumerous classes, the theory of definite descriptions, the construction
of matter from sense data, and several others. Generally expressions
for such entities are called "incomplete symbols" and the entities
themselves "logical fictions". The notion originates with Russell's
logicist program of reducing mathematics to logic, was widely used
by Russell, and led to the later Logical Positivist notion of construction
and ultimately the widespread use of set theoretic models in philosophy.