contrary to the facts of an event, situation, etc.
noun
a counterfactual idea, assumption, or argument
See counterfactual in American Heritage Dictionary 4
(kounˌtər-făkˈcho͞o-əl)
adjective
Running contrary to the facts: “Cold war historiography vividly illustrates how the selection of the counterfactual question to be asked generally anticipates the desired answer”(Timothy Garton Ash).