This question has sliders. When the minimum and maximum for the sliders are set to non-numeric values, LS does not complain, but the sliders cannot be adjusted when the survey is run. When the page is submitted, LS throws an error pop-up saying, "One or more questions have not been answered in a valid manner. You cannot proceed until these answers are valid." (If the min/max are set to percentage values, e.g., '0%' and '100%', then they can be adjusted, but the error is still thrown on submission.)
LS should probably disallow the non-numeric min and max when they are set in the Advanced Settings.
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