I can't access the entire database, I can only enter the name of someone whose entry needs to be checked. So people who were only showing up when you play easy didn't come to my attention, since I always play difficult to (with any luck) score for my team. Obviously, players in the easy game are happy to have such hints given to them! But when they are reported, I can sort them out.
The names are all in a single pool, but they are selected for the different games based on performance statistics - Terry didn't move any actual names around, just adjusted the selection algorithm. And it is also clear the the easy game gets a small number of difficult people, just as the difficult game gets a few easy ones. That mix is the difference between the two games, it is not a matter of selecting from two discrete sets of questions.
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(Editor in Humanities, Religion, Literature and For Children)
That's all, folks!