An answer, which is nonsense on a high level of nonsense an has nothing to do with "honestly". An Agnostic knows he not knows whether god is existing or not existing. But an agnostics for example also knows that he don't know whether the reality all around us is existing or not existing too. Nevertheless a broken leg for example is a very real thing. In case of the belief in god an agnostics has a lot of possibilities to answer: "I believe in god" for example or "I do not believe in god", "I don't know, what to believe" or "I don't know what's real and wether a deeper spiritual context is existing" are possible answers. Or "Sometimes I believe in god and sometimes not" is an answer. Or "I believe in god when I take a look at his creation, but when I see what human beings are doing with his creation then I don't believe in god anymore" and so on and so on. An adult is doing what the parents tell him to do although on reason it is good to do so.