Under the strong influence of the philosophical system of Leibniz and Wolff, Kant began to doubt the basic answers of past philosophers. Then, Kant read a Scottish philosopher, David Hume. Hume had tried to make clear what our experience had been, and had reached a very strong opinion called "skepticism", that there was nothing to make our experience sure. Kant was very shocked by Hume, and saw the theory he had learned in a new point of view. He began to try finding a third way other than the two that Kant called "skepticism" and "dogmaticism".