A presumption is a belief or hypothesis about something. An assumption is taking a piece of information (as in knowledge about a topic) as a given fact. When you put them together, a presumptive assumption is troublesome because you can assume in error.
If your hospital doesn't plan to take advantage of government financial incentives for those who become "meaningful users" of EHRs, it is in the minority. According to HHS, 85% of hospitals plan to demonstrate meaningful use and earn incentives by 2015.
A Boston resident is at a New York Yankees game in the Bronx cheering on his beloved Boston Red Sox. Despite his best efforts to catch a foul ball coming into the stands, he misses, and the ball bounces off his head. He's woozy, and ballpark officials suggest he get to a hospital for precautionary reasons.