So your claim is that up until 2003 journalists were routinely revealing the sources they base stories on ? That's so patently ridiculous so some evidence on y

So your claim is that up until 2003 journalists were routinely revealing the sources they base stories on ? That's so patently ridiculous so some evidence on your part would be useful. Because we know that many of the biggest stories of all time e.g. Watergate (1972) relied on anonymous whistleblowers.