This means that no single logic is strong enough to support the total construction of human knowledge.

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• Jean Piaget:

  Our problem, from the point of view of psychology and from the point of view of genetic epistemolog

• Jean Piaget:

  It is with children that we have the best chance of studying the development of logical knowledge,

• Jean Piaget:

  To express the same idea in still another way, I think that human knowledge is essentially active.

• Jean Piaget:

  Knowing reality means constructing systems of transformations that correspond, more or less adequat

• Jean Piaget:

  The first type of abstraction from objects I shall refer to as simple abstraction, but the second t

• Jean Piaget:

  On the one hand, there are individual actions such as throwing, pushing, touching, rubbing. It is t

• Jean Piaget:

  Reflective abstraction, however, is based not on individual actions but on coordinated actions.

• Jean Piaget:

  In genetic epistemology, as in developmental psychology, too, there is never an absolute beginning.

• Jean Piaget:

  From this time on, the universe is built up into an aggregate of permanent objects connected by cau

• Jean Piaget:

  The self thus becomes aware of itself, at least in its practical action, and discovers itself as a