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10 Cards in this Set
- Front
- Back
Thales
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held that the basic stuff out of which all else is composed is water
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Anaximander
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held that the original source of all things is a boundless, indeterminate element.
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Anaximenes
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said that the underlying principle of all things is air.
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Pythagoras
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maintained that enumerability constitutes the true nature of things.
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Heraclitus
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held that the only reality is ceaseless change and the underlying substance of the universe is fire.
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Parmenides
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said that the only reality is permanent, unchanging, indivisible, and undifferentiated being and that changes and motion are illusions of the senses
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Zeno
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divised clever paradoxes seeming to show that motion is impossible.
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Empedocles
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held that apparent changes in things are in fact in the positions of basic particles, of which there are four types: earth, air, fire, and water. Two forces cause these basic changes: love and strife.
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Anaxagoras
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mantained that all things are composed of infinitely divisible particles; the universe was caused by mind (nous) acting on matter.
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The Atomists
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(especially Leucippus and Democritus) said that all things are composed of imperceptible, indestructible, indivisible, eternal and uncreated atoms. Motion needs no explanation.
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