TIM COOK: The FBI wants you to hack into the cell phone used by the San Bernadino terrorists. You say something like, “No Way. If we give you a back door, you will use it against any and all US citizens.”
SOLUTION: Mister FBI man, simply give the actual cell phone to Tim Cook. Tim Cook will give the actual cell phone to his lab. His lab people will extract the data, then close the “back door” forever. The lab people will then hand over to the FBI Man all the data, and the now sealed cell phone.