Answer:
The geographical location of New York makes it easier to be a natural link from New England to states like Ohio, Pennsylvania, or Michigan because it is in the center of the two regions. There is also no mountains in the route from New England to the states across.
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'