The first type of abstraction from objects I shall refer to as simple abstraction, but...#Jean Piaget
Scientific knowledge is in perpetual evolution; it finds itself changed from one day to the...#Jean Piaget
Reflective abstraction, however, is based not on individual actions but on coordinated actions.#Jean Piaget
On the one hand, there are individual actions such as throwing, pushing, touching, rubbing. It...#Jean Piaget
Logical positivists have never taken psychology into account in their epistemology, but they affirm that...#Jean Piaget
Knowing reality means constructing systems of transformations that correspond, more or less adequately, to reality.#Jean Piaget
