//Names changed slightly to protect the wicked public interface IProvideBoolean { Boolean True { get; } Boolean False { get; } } public class Boo

//Names changed slightly to protect the wicked public interface IProvideBoolean { Boolean True { get; } Boolean False { get; } } public class BooleanProvider : IProvideBoolean { public Boolean True => true; public Boolean False => false; } So.... SOLID.... If there's ever a third value for Boolean, I Will Be Ready.