I have a form with a preliminary question that the user must answer correctly before proceeding (it establishes they are looking at the correct unit). I set it up so that the rest of the questions are required, but conditionally visible. Once they answer the first question correctly, the rest will appear.
The problem comes if the user attempts to submit it even when they have the question wrong. It still submits even though the actual form's questions haven't been answered yet.
How can I set up my form so that it won't submit if those invisible questions are blank because the first question wasn't answered correctly? I only want the questions to be conditionally visible, not conditionally required.