Because the math doesn't back up their words, which is frequently the case.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

"I know the pundits, and I know what they say: The math doesn't work out, " Huckabee said Saturday morning at the Conservative Political Action Conference in Washington.

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When Governor Romney and his allies tell us we can somehow lower our deficit by spending trillions more on new tax breaks skewed towards the wealthy, the math doesn't work.

WHITEHOUSE: The White House

"Math error doesn't work for fact and circumstance" situations.

WSJ: Lawmakers Consider Expanding IRS Power to Flag Errors Before Audits

That's why I want to cut the growth of tuition in half over the next 10 years. (Applause.) That's why I want to recruit 100, 000 new math and science teachers so our country doesn't fall behind.

WHITEHOUSE: The White House

If this is correct, it doesn't take a math wizard to understand that having a single radio module that works virtually anywhere means notebook vendors can build a single model of a product and ship it anywhere in the world, knowing it can be activated on any of today's commercial networks.

FORBES: Magazine Article

With a 720 x 720 Super AMOLED 3.1 inch display, the Q10's screen is slightly larger than its touch hybrid predecessor, the Bold 9930, and sports a much tighter pixel density of 328ppi (BlackBerry claims the display is 360ppi, which doesn't jibe with our math).

ENGADGET

He prefers the latter, noting that the U.S. doesn't produce enough science, math and engineering graduates to fill the open posts in high-tech.

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This adds to anxiety among industry professionals and policy leaders that the U.S. could fall behind other countries in innovation if it doesn't foster education in STEM (science, technology, engineering and math).

CNN: Molding the next generation of computer scientists