| It soon became the subject of vigorous controversy because of its nonconstructive nature. |
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| He believed that this approach led to conceptual clarity and prevented the mathematician from getting lost in the details, but even some experts disagreed with such nonconstructive proofs. |
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| This nonconstructive attitude, which is likely to complicate not only Rightsholders' but also cable operators' business, has thus so far been confronted in a clear statement of solidarity by all groups of Rightsholders. |
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