Conspiracy?

Glenn Greenwald takes us on a merry trip down memory lane, back to when anthrax attacks were on everyone's lips. As he reminds us, ABC News claimed that "four well-placed and separate sources" said the anthrax contained bentonite, which was linked to Saddam Hussein. ABC News refuses to divulge who these sources were, even though they were clearly lying. Does not four separate sources telling the same lie indicate a conspiracy?