That users could choose to shut off the flow altogether would be a prod to advertisers to create the appearance of value in their marketing messages.

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If we take his doddery appearance at face value, he is the CEO of a publicly traded company, controls about 40% of it, and appears out of touch with what is going on in the company.

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We place a lot of value in appearance and Levi Aron certainly appears non-threatening.

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Its appearance, taste and nutritional value are identical to its non-engineered siblings.

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Paper currencies have no intrinsic value and need the appearance of worth to inspire public confidence.

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While demonstrating statistically significant benefits in a broad population would be the ideal test before implementing Watson far and wide, a dramatic demonstration of its value, similar to its appearance against champions on Jeopardy!

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The fish reaches maturity more quickly than its natural cohorts but the genetic change confers no detectable difference in its appearance, ultimate size, taste or nutritional value.

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Another problem with the rankings, not yet fully resolved, is that paid appearance fees to just a few top players can significantly boost the point value of an otherwise undistinguished tournament, which the top stars may then win. (This practice isn't allowed on the PGA Tour.) Westwood, then No. 2, earned 20 rating points for winning last spring's Indonesian Masters, in which the next-highest player in the field was ranked No. 90.

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