How to prevent advancing without text boxes filled in
I am working on this interaction about unconscious bias. The learner needs to fill in the text boxes on the bottom of the screen, then click next. Later in the course, the same screen appears but with their entries populated in the boxes. For the first slide, I would like to prevent the user from advancing if any of the text boxes are still blank.
Do I have to set variables for everyone of these text boxes, make triggers to change the variable then have yet another variable that only adjusts when all those variables are adjusted? It's the only way I can think to do it. Is there an easier way that I am not seeing.
Really hoping I am going to have a "duh" moment here and one of you is going to point out something completely obvious that I am overlooking.
I attached screenshots of the slide and triggers.