I'd argue that a 'conspiracy factor' of 1 is not a conspiracy, just like a road with an occupancy factor of 0 doesn't have any cars on it, and I presume this was exactly the point of the GP.

Fair, a conspiracy requiring just two people to pull it off is assigned a conspiracy factor of 1. 10K or more is assigned 0.0. Use it in conjunction with other factors to determine overall probability.