So I wanted to let our users know about this.

So how come the the park's users did not know about it?

At first, users may not remember their own names, forget they are human, or even know what that means.

But the general user either won't care about this or just not even know.

So I wanted to let our users know that this has all actually really happened.

Lee notes that users of the system would never have known about the failure if they hadn't been told.

Will the user know that they have done the right thing after performing the action?

It's too difficult to do, and their users probably don't even know they're infected.

So we start with something the user knows, which is the idea being that it's a secret.

The users on his network already know how to send messages and they don't have to learn anything new.