A bad thesis question would be: "Is the Earth round?" This is easily answered with a "yes," and doesn't leave room for argument or analysis.
A good thesis question, on the other hand, would be something that provokes deeper investigation and allows for nuanced argumentation. For example:
* "To what extent did the Enlightenment ideals influence the American Revolution?"
* "How does Shakespeare use imagery to convey the theme of ambition in Macbeth?"
* "What are the long-term effects of social media on adolescent mental health?"
These questions are complex and require substantial research and analysis to answer thoroughly. Your answer to the question will essentially *become* your thesis statement. Instead of stating a conclusion directly, the paper will build an argument to answer the question posed. The answer is your thesis *argument.*
In short, posing a compelling question can be a highly effective way to structure your thesis. Just ensure it's a question that requires substantial investigation and allows for a sophisticated, well-supported answer.