Interestingly I find the examples very difficult to understand. I replaced the table "raining? umbrella? faithful?" with "raining? umbrella? dry?". Then made

Interestingly I find the examples very difficult to understand. I replaced the table "raining? umbrella? faithful?" with "raining? umbrella? dry?". Then made sense in my head only if I write something like this: dry = umbrella || !raining If I use my umbrella. I'm don't care it rains. Otherwise I will be dry only if it does not rain.