Suppose, if you will, that someone hands you an envelope. You open it and read a short sentence. The sentence doesnt make much sense to you.
NOW the person hands you another envelope. Inside it tells you that once you know what that sentence is - if ANYONE in the know even suspects you might know this key sentence? Very Bad Things(tm) will happen to you and people you know. Very. Bad. Things.
But now that you know it, you can not forget it. You could try to find out what it means. It is possible you might find out why it is so dangerous. If the others dont find out that you know the sentence first. Or you can take this secret to your grave.
The person left as you were reading the second message. You're alone.
So, my little spies, what do you do?