WASHINGTON — It had a familiar ring: “I don’t ever know what people’s motives are,” said former President Bill Clinton, prompting one to pause and consider just what the definition of “motives” is. Indeed, one doesn’t ever know. But when a country or a firm gives large sums of money to a charity founded by a former U.S. president, whose wife happens to be secretary of state, and whose department may be considering business related to said donor, then one would not likely infer purely altruistic motives.