| 11. | Herbert was the author of some remarkable works replete with abstruse learning.
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| 12. | Other displays were attempts to make the abstruse intelligible.
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| 13. | Some university-based research can sound ridiculously abstruse.
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| 14. | Reproductions make him seem like a puzzler, his paintings like abstruse ideas.
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| 15. | Freud divided people, not into abstruse psychiatric categories,
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| 16. | And not because his movies are difficult or abstruse.
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| 17. | But these are difficult and abstruse questions, Joseph.
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| 18. | All this may sound rather abstruse and intimidating.
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| 19. | The television spots may seem abstruse to some viewers, but not to Cerf.
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| 20. | Some found them too dreamy and abstruse, to the point of being unintelligible.
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