Indianmoose

“I classify unknowns into one of the following two types: known unknowns (expected or foreseeable conditions), which can be reasonably anticipated but not quantified based on past experience as exemplified by case histories. Then unknown unknowns (unexpected or unforeseeable conditions), which pose a potentially greater risk, simply because they cannot be anticipated based on past experience or investigation. Known unknowns result from recognized but poorly understood phenomena. On the other hand, unknown unknowns are phenomena which cannot be expected because there has been no prior experience or theoretical basis for expecting the phenomena.”
― James Rosone, Monroe Doctrine: Volume III