The correct answer to this open question is the following.
Although we have no options attached, we can say the following.
The step in the scientific method that Magnus refers to in this quote is the "Testing step."
When Magnus refers to the idea of " “We will give the correct view about comets and confirm it..." he meant that the idea was going to be tested to really make a confirmation statement about the validity of the theories.
The Scientific Method has five basic steps that every single scientists and researcher have to follow in their studies.
First, to make observations. Secondly, asks questions. Thirdly, draft a good and complete hypothesis. Then, make predictions based on the hypothesis. And finally, scientists have to test the predictions to confirm and validate.
