| 1. | The impenetrability of rules and statutes is something that we should not let exist.
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| 2. | Lead is one of his favorite materials, one that suggests weight and impenetrability.
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| 3. | This impenetrability of the information elaborated by the mental modules limits the scope of interpretationalism.
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| 4. | They are described as having " specializ [ ed ] in Kraut-baiting impenetrability ."
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| 5. | But the aura of impenetrability that Fidelity has long cultivated has helped to fuel some bizarre incidents.
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| 6. | The sense of impenetrability begins at the Vatican gate just beyond St . Peter's Square.
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| 7. | Due to the perceived impenetrability of these perimeter defenses, the Emperors kept no central reserve army.
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| 8. | This land was chosen for its impenetrability by invaders, and for its fertility, and good rivers.
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| 9. | The success of Tuesday's terrorist attack will undoubtedly encourage others by shattering the illusion of our impenetrability.
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| 10. | His vision of the land had a new intricacy and richness, and sometimes a sense of finality or impenetrability.
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