So for all of you Portal Two fans out there, you may recognize the title from a little sign you had read. What would happen if some rogue robot attacked? Would you freak out, or would you stand still, remain calm and yell out all the paradoxes you know? Screech them out here for others to know!
I found three:
"This statement is false!"
"New mission: Refuse this mission!"
"Does a set of all sets contain itself?"
If you don't know what a paradox is, it's supposed to mess with your mind with an impossible answer, because there is not correct answer.