In ancient Greece, Socrates was a widelyrecognized wise man.One day one fellow met the great philosopher and said, “Do you know what I just heard about your friend？”
“Hold on a minute，” Socrates replied.“Before telling me anything I'd like you to pass a little test.It's called the Triple Filter Test.” “Triple filter？” “That's right，” Socrates continued.“Before you talk to me about my friend, it might be a good idea to take a moment and filter what you're going to say.That's why I call it the triple filter test.
The first filter is Truth.Have you made absolutely sure that what you are about to tell me is true？” “No，” the man said, “actually I just heard about it and...”“All right，” said Socrates.“So, you don't know if it's true or not.”
