Jean Piaget quoteJean Piaget [1896-1980]
Swiss Psychologist 
Quote rank: 208
| To reason logically is so to link one's propositions that each should contain the reason for the one succeeding it, and should itself be demonstrated by the one preceding it. Or at any rate, whatever the order adopted in the construction of one's own exposition, it is to demonstrate judgments by each other. |
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