I believe the answer is: Predict the outcomes of experiments before they are told the actual results.
By making them predicting the outcome of the experiment, dr. donelian would expose them with the fact that their prediction would often be wrong. After experiencing this, the students would no longer see the experiment as 'documenting the obvious'
Something used to represent an idea or process.
Maura hopes that the psychic has the ability of foresight,
in which this is an ability of having to be able to predict what will happen
next or what will happen in the future. Maura hopes that the psychic has this
type of ability because she wants to know about her future in terms of
marriage.
Alaska is the closest state to 20N 158W
edit: 20n is actually Hawaii i think, Nhallman has it right.