Counterfactual history (also virtual history) is a form of historiography that attempts to answer the What if? questions that arise from counterfactual conditions.[1] Counterfactual history seeks by "conjecturing on what did not happen, or what might have happened, in order to understand what did happen."[2] It has produced a literary genre which is variously called alternate history, speculative history, allohistory, and hypothetical history.[3][4]
Arnold
was invoked but never defined (see the help page).