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Republican Rep. Paul Ryan wants to balance the federal budget within 10 years, largely through scrapping Obamacare and remaking Medicaid and Medicare. Like all budgets, the plan is based on assumptions, namely that a balanced budget in such a short time is a good thing and that economic growth will outpace the growth in government spending -- pegged at 3.4 percent. How can you reality check those numbers? Also, how LinkedIn, once the unglamorous social networking sibling, has taken the buzz away from Facebook.