My survey has 4 questions and the last two having the long free text question type. I want that my respondents answer either the 3rd or the 4th question or both but not neither. There should be at least one of these last two questions answered. Can I do this and how? I just tried the is_empty function in the conditions but this would trigger if the next question is shown or not. I would have wanted that the condition be used to identify if the question is set to mandatory or not. Thanks!