Experiments and surveys are designed to test possible answers to questions. Even library research is based on questioning. A question calls for an answer. Although there may be differences of opinion about shades of meaning, the question has a definite answer that most people would accept. In answering the question, you can describe the relevant differences of opinion.
Questions also provide a means to evaluate answers.
If you start with a question, you will have a way to know when to stop your research. Partial information on a topic may answer a question completely. But even a partial answer is still an answer. A question can be narrowed or broadened. A question leads to other questions.