using System;

public class Program

{

    public static void Main()

    {

        bool alwaysTrue = true;

        bool? nullableBool = null;

        if(nullableBool ?? false && alwaysTrue)

            Console.WriteLine("1. nullableBool was null and somehow evaluated True even with ?? false");

        else

            Console.WriteLine("2. nullableBool was null and evaluated false by way of ?? false");

​

        if(nullableBool ?? true && alwaysTrue)

            Console.WriteLine("3. nullableBool was null and evaluated true by way of ?? true");

        else

            Console.WriteLine("4. nullableBool was null and somehow evaluated false even with ?? true");

    }

}