When does saying you're sorry go from an expression of regret to an apology? The sad thing about this is that some people don't know the difference. Deborah Tannen, a professor at Georgetown University, reports: "The First Lady… 'I regret very much that the efforts on health care were badly misunderstood, taken out of context, and used politically against the Administration. I take responsibility for that, and I'm very sorry for that' she said. The first part of the quote clearly indicates that the fault was not with ....