The Old Saint And Three Questions

Once upon a time, there was a hero and an old saint. And like in any story with a hero and an old saint, the old saint asked the hero — three questions! But here's the twist: each question was a **binary** question, which means that the answer to each must be either a 'Yes' or a 'No', not none, not both. Our hero, who was not so wise in the ways of science, answered them arbitrarily and just hop