someone a question, he gave some affirmation or assertion, and you replied, “Are you sure?” He said, “Yes, I’m sure.” Your next question was, “Are you sure you’re sure?” When we talk about certitude or certainty, we’re talking not simply about philosophical categories. Instead, we are describing, in a sense, our emotional state with respect to various questions or assertions. Assurance of truth claims operates on a broad continuum. For example, someone could say to you, “Do you believe that God exists?”