In every case of political unrest in a certain country, the police have discovered that some unknown person or persons organized and fomented that unrest. Clearly, ttherefore, behind all the cases of political unrest in that country there has been a single mastermind who organized and fomented them all.
The flawed reasoning in the argument above most closely parallels that in which every telephone number in North America has an area code, so there must be at least as many area codes as telephone numbers in North America.