What is a soup question?

"Soup question" is not a standard term in any field. It's possible you're thinking of something else. Could you please provide more context or information about what you mean by "soup question"?

For example, are you asking about:

* A question related to soup itself? (e.g., "What's the best way to make tomato soup?" or "What is the history of soup?")

* A question that is considered to be "thin" or lacking substance? (e.g., a question that is easily answered or doesn't require much thought)

* A question that is asked in a casual or informal setting? (e.g., a question asked over a bowl of soup)

Please give me more details so I can understand your query and help you better.