The auto industry is right now looking at unknowable change, rushing toward it at unknowable speed. Will cars quickly become four-wheel drones, most of them operated by Uber and Lyft, as some claim? Will the total number of cars produced each year be drastically slashed because, instead of sitting idle for hours each day in driveways and parking spaces, they will be efficiently shuttling from one transportation consumer to the next, directed by smartphone? Or will owner-driver operation continue for those who prefer and can afford it? Or will that be forbidden by insurance companies that discover drone cars actually, as optimists propose, eliminate accidents? Consult the usual authorities on the speed with which electric will replace combustion: Here’s one that says 37 percent electric by 2040. Don’t like it? No problem, Bob, just change the channel and find another expert predicting an outcome you like better. Who needs reality when opinion is so much cheaper?