Hal Hellman Quotes

• One sees what one wants to see when there is in mind a pre-conceived notion.

  Hal Hellman

  Thinking, Mind, Want

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• A fervently believed idea, even if wrong, dies hard.

  Hal Hellman

  Thinking, Ideas, Dies

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• Disputes among natural philosophers are of use to science, as the quarrels of the great, and the clamors of the little, are necessary to freedom of thought and the advancement of learning.

  Hal Hellman

  Thinking, Advancement, Use

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