Verify that emphasized or quoted text is not just visually styled but
also uses <em>,
<strong>,
<blockquote>, or
<q>.
i instead of em for emphasized text:
This emphasized text doesn't use a proper
<em> element (instead it uses an
<i> element):
You shouldn't have done that!
Note: Hard to automatically test or detect. Requires a human tester or AI
to find all emphasized texts, and verify that these texts are properly
nested within <em> elements