Elements whose parent elements have failing conditional processing attributes are able to be referenced and rendered by 'use' elements.
Define three 'rect' elements that have a 'g' parent with either an invalid 'requiredFeature', 'requiredExtension', or 'systemLanguage'. Then define three 'use' elements that reference the 'rect' elements. Verify that the 'use' elements render.
Run the test. No interaction required
Test passes if there is no red visible on the page.