The final tests, just as the product is ready for market, are the field tests and it is very possible that the differences in coverage were not noticed because they were being tested as standalone devices and NOT against other devices in the same area by the same person.

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When the Republicans and the president agreed Sunday to negotiate a balanced budget, they broadly assured it would "protect future generations, provide adequate funding and help working families" but the philosophical differences for achieving those goals are just as broad.

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The literature on similarities and differences between ES cells and iPS cells, he said, is quite controversial and scientists still do not know whether differences between different iPS cell lines are just due to genetic differences between the adult cell lines that were used for reprogramming or whether genetic changes occurred during reprogramming.

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