While it is not at all impossible that there are WMD in Iraq, this guy's claims aren't really evidence at all for anything. What people tend to forget is that the whole lying part has very little to do with the actual existence of WMD in Iraq. It could be that there are no WMD, while Bush and Blair had good reasons to believe they were there, and it could be that there are WMD, while Bush and Blair had no reasons whatsoever to believe they existed. A lie is defined by the relation between claims and knowledge, not by the relation between claims and reality.