[Undertoad]

As Den Beste puts it,

it truly is a hypothetical question, because it's virtually certain that they do. As someone pointed out, to believe that they do not you'd have to believe that after they kicked the inspectors out, they then spontaneously destroyed the remaining chemical and biological weapons known to still exist at that time, but to not keep any records of having done so and to not include any such records or proof in the report they provided to the UN last December, and to actively resist all attempts to confirm that they were gone during the inspections in December and January.