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All knowledge that is not the real product of observation, or of consequences deduced from observation, is entirely groundless and illusory.

Jean Baptiste Lamarck

It is not always the magnitude of the differences observed between species that must determine specific distinctions, but the constant preservation of those differences in reproduction.
JEAN BAPTISTE LAMARCK

Determination Difference Observation Reproduction
It is not enough to discover and prove a useful truth previously unknown, but that it is necessary also to be able to propagate it and get it recognized.
JEAN BAPTISTE LAMARCK

Discover Enough Necessary Recognition Truth Unknown
Habits form a second nature.
JEAN BAPTISTE LAMARCK

Form Habit Nature
All known living bodies are sharply divided into two special kingdoms, based upon the essential differences which distinguish animals from plants, and in spite of what has been said, I am convinced that these two kingdoms do not really merge into one another at any point.
JEAN BAPTISTE LAMARCK

Animal Difference Known Live Myself Point Sharp
All knowledge that is not the real product of observation, or of consequences deduced from observation, is entirely groundless and illusory.
JEAN BAPTISTE LAMARCK

Consequence Illusion Knowledge Observation Product Reality
It is not the organs-that is, the character and form of the animal’s bodily parts-that have given rise to its habits and particular structures. It is the habits and manner of life and the conditions in which its ancestors lived that have in the course of time fashioned its bodily form, its organs and qualities.
JEAN BAPTISTE LAMARCK

Animal Character Condition Fashion Life Organ Quality Structure
The form follows the function.
JEAN BAPTISTE LAMARCK

Follow Form Function
What nature does in the course of long periods we do every day when we suddenly change the environment in which some species of living plant is situated.
JEAN BAPTISTE LAMARCK

Change Day Environment Nature Plant Species

All knowledge that is not the real product of observation, or of consequences deduced from observation, is entirely groundless and illusory.

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All knowledge that is not the real product of observation, or of consequences deduced from observation, is entirely groundless and illusory.

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