Two instances stand out in my memory (spoilers, I guess) - Donna noting that there were no sick days taken by the employees at that company, and recognising how strange that was, and Donna working out, after attending to them and following them along for an entire episode, that the engravings in that underground city were dates.
That seems to be Donna's brand of genius - taking in little pieces of information that the Doctor overlooks, and working at them to fit them together and into a wider context of past experience, and working up to an interesting conclusion from those details. It seems very Si-with-Je to me.
I also think that she has to be an F. One of the most consistent aspects of her characterisation (and one of the things I like best about her) is her constant questioning the doctor's morality. I also think she's more SF than NF, since her moral subjects are usually individuals. The doctor is very much morally concerned, but he's more inclined to lose sight of the individual in pursuit of some more general moral concern, or, sometimes, with some non-moral fascination.
Definitely.Originally Posted by jenocyde