He displayed a deep knowledge of communications technologies and their likely future consequences to telecom producers and consumers.

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Like Mr Gates, he has a deep knowledge of military and intelligence affairs, broad bipartisan support and a streak of stubborn independence.

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Brennan joined the agency after responding to a newspaper want ad, and he spent 25 years there, developing a deep knowledge of the Mideast and fluency in Arabic.

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"It is for someone with a deep, deep reservoir of knowledge, he said, and "Kerry has that kind of knowledge.

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He is a skilled debater and had a deep knowledge of the content.

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He knows practically everyone in Ubud and has a deep knowledge of Balinese history and culture.

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He finds that both institutions put a premium on deep knowledge of academic disciplines and using technology to change the world.

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Having studied for five years under top Chinese professors, he now co-writes learned papers on Eastern medicine in Mandarin, drawing on a deep knowledge of ancient Chinese philosophy and cosmology.

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One colleague who worked closely with Mr. Thompson at PayPal said he was a "hard-working and detail-oriented" manager who peppered subordinates with questions to show his deep knowledge of their affairs.

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