As Mr. Big Food culls crappy old cookbooks for recipes worthy of inclusion in his Big Food Manual and Survivalist Flourishing Guide, he often finds recipes with the same name, but which are not the same. To get a Super Bowl Roman Numeral designation, a recipe must 1) be titled exactly the same as at least one other in the Big Food Manual; 2) have at least two ingredients different from the first or others of the same name; or 3) have at least two different preparation (including cooking) methods. “Or” in this context is not a simple word.
Necessary, sufficient or both? Mr. Big Food says both. A recipe– worthy of inclusion– gets a new Roman numeral iff (if and only if) … at least … . The recipe has to be different in at least two fundamentally different ways. It’s fun to flesh out exactly what necessary and sufficient means, especially in the context of delicious Oven Fried Chicken. Very logical.