Lets talk racial proclivities for a moment. Trolls do not have the same potential intellect as a human. This might not be due to genetics or nutrition. This might be psychological. First of all, even a weak troll is exceptionally strong and durable when compared to an average human - the smallest of trolls can readily match high end human athletes for the purpose of strength and endurance. This means that they may, as humans are wont to do, approach problems with the easiest solution for much of their life - especially the all important developmental years, the effects of which we have increasing evidence to suggest their long term effects on the individual. The easiest solution of course being, use their superior physical capabilities. The result is a troll who has been his own intellectual enemy - he has not had to try (and don't give me the 'but some will anyhow!' Trolls are rare, and people who try to take the hard road equally so. Rare multiplied by rare means you don't find that individual in all but the tiniest percentage of the population.) so, he simply has not developed what might otherwise be an exceptional mind - and do not mistake me when I say it like that; a logic of 5, is in fact, an exceptional mind. Further, being dumber... well, they're not dumber. Humans simply have more room for variation - you can have a well and properly dumb human (In fact, I know plenty of those in the real world,) and they'll equal out to a well and properly dumb troll. Their valleys are the same, it is only in their peaks that they differ. As the reason being the ultimate weapon? A very talented mechanic I know once told me: There is no replacement for displacement. A troll may not have greater potential to be an idiot, but they certainly have greater potential as soldiers, bodyguards, athletes, and, from a certain point of view, an equal potential as a scientist. A human scientist may have a higher peak, but imagine then, if you will, the troll scientist. Perhaps he has a logic of five where the human has a logic of six. The human, after some hours, grows fatigued, they are tired, and they begin to dull. The troll at this time however? They've physical endurance the human does not - they keep functioning at full steam, and get better results in the second half, if you will excuse the turn of phrase. By hour eight of the 12 hour corporate workday, the human is tired enough to make an ever increasing number of errors, but that troll is just getting started - and that is the power of their high body, and no, it isn't willpower - willpower would mean resistance to distractions, etc, and your brain being a part of your body does mean that using it can make you physically tired.