The effect that occurs when two people named Ismail convince you of something, or convince you to do something as long as it doesn't break the law. There is a 99.8% chance that Ismail and Ismail will successfully convince the subject. There are only a handful of recorded unsuccessful cases, though many say they are false reports.
Example 1:
Person 1: Wow I can't believe Ismail S. and Ismail H. convinced me to go camping at Joshua Tree, I hate the outdoors!
Person 2: They call that the Double-Ismail Effect
Example 2:
Someone get me two Ismails, this situation calls for The Double-Ismail Effect.