As Adam has noted, " there's sometimes a fine line between historical analysis and 'What-iffery'". Unless it goes to ridiculous extremes, the 'what if' scenario is really only the subjective reverse side to 'what did happen'. In some cases, that can be a fairly straightforward observation. For example, 'If' the Commonwealth troops had not used Funnies on D-Day they may have had their own Omaha. Quite plausible but it goes off the rails once you take that thought and ask more hypothetical questions. For most of us, it's hard not to go there to some degree and the mental exercise can be fun. What if Patton was a woman?