Abstract
In 2003, the then president of the United States, George W. Bush, started a war against Iraq, under the arguments that Saddam Hussein had possession of several weapons of mass destruction and that he harbored members of Al-Qaeda. The question of the existence of these weapons was questionable, but it led to a war that culminated in Hussein's removal from power and his arrest – later sentenced to death for his conduct in that country. It is interesting to show that the existence – or not – of that arsenal, never seen before, is a question about an ontology. The question about how the intelligence service arrived at this answer is epistemic; defining how a conclusion is reached, like the one we illustrate, or how it is sustained, are epistemological biases.