You can have catastrophic parsing errors with the “lax” HTML too. For instance: ...

You can have catastrophic parsing errors with the “lax” HTML too. For instance:

    <!doctype html>
    <title>…</title>
    <p>Important: Do <strongNOT</strong> come into the office tomorrow!

Or:

    <!doctype html>
    <title>…<title>
    <p>Important: Do <strong>NOT</strong> come into the office tomorrow!