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"Logic and mathematics are nothing but specialised linguistic structures."
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"A thousand minus one is never a thousand."

"Where's your common sense? None of those books agree with each other. You've been locked up here for years with a regular damned Tower of Babel. Snap out of it! The people in those books never lived. Come on now!"

"Reason itself is fallible, and this fallibility must find a place in our logic."

"There is no logic in logics except an illogical logic."

"The logic of validation allows us to move between the two limits of dogmatism and skepticism."

"Rationality and common sense never goes out of fashion."

"Apriority creates ambiguities among ideas."

"If-Then" is a structured logic of humans' thought,who have memories and imagination in their mind. If both don't exist, Then this quote has never even been written."
Explore more quotes by Jean Piaget


"The more the schemata are differentiated, the smaller the gap between the new and the familiar becomes, so that novelty, instead of constituting an annoyance avoided by the subject, becomes a problem and invites searching."


"Logical positivists have never taken psychology into account in their epistemology, but they affirm that logical beings and mathematical beings are nothing but linguistic structures."


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


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