diff --git a/source b/source
index ff4fa7eb435..7fa39c57e7e 100644
--- a/source
+++ b/source
@@ -13473,10 +13473,7 @@ Transport Protocol">HTTP&lt;/abbr> today.&lt;/p></code></pre> <!-- DO NOT REWRAP
      data-x="attr-input-type-tel">Telephone</span> state, then return '<span
      data-x="concept-ltr">ltr</span>'.</p></li>
 
-     <li><p>If <var>element</var> has no parent element, then return '<span
-     data-x="concept-ltr">ltr</span>'.</p></li>
-
-     <li><p>Return <span>the directionality</span> with <var>element</var>'s parent.</p></li>
+     <li><p>Return <span>the parent directionality</span> with <var>element</var>.</p></li>
     </ol>
    </dd>
   </dl>
@@ -13500,10 +13497,9 @@ Transport Protocol">HTTP&lt;/abbr> today.&lt;/p></code></pre> <!-- DO NOT REWRAP
      <ref spec=BIDI></p></li>
 
      <li><p>If <var>element</var>'s <span data-x="concept-fe-value">value</span> is not the empty
-     string or <var>element</var> has no parent element, then return '<span
-     data-x="concept-ltr">ltr</span>'.</p></li>
+     string, then return '<span data-x="concept-ltr">ltr</span>'.</p></li>
 
-     <li><p>Return <span>the directionality</span> with <var>element</var>'s parent.</p></li>
+     <li><p>Return <span>the parent directionality</span> with <var>element</var>.</p></li>
     </ol>
    </li>
 
@@ -13541,6 +13537,12 @@ Transport Protocol">HTTP&lt;/abbr> today.&lt;/p></code></pre> <!-- DO NOT REWRAP
    <li><p>If <var>codePoint</var> is non-null and it is of bidirectional character type L, then
    return '<span data-x="concept-ltr">ltr</span>'.</p></li>
 
+   <li><p>Return <span>the parent directionality</span> with <var>element</var>.</p></li>
+  </ol>
+
+  <p>To compute <dfn>the parent directionality</dfn> given an element <var>element</var>:</p>
+
+  <ol>
    <li><p>If <var>element</var> has no parent element, then return '<span
    data-x="concept-ltr">ltr</span>'.</p></li>
 
@@ -13549,9 +13551,7 @@ Transport Protocol">HTTP&lt;/abbr> today.&lt;/p></code></pre> <!-- DO NOT REWRAP
 
   <p class="note">Since the <code data-x="attr-dir">dir</code> attribute is only defined for
   <span>HTML elements</span>, it cannot be present on elements from other namespaces. Thus, elements
-  from other namespaces always just inherit their <span data-x="the
-  directionality">directionality</span> from their parent element, or, if they don't have one,
-  default to '<span data-x="concept-ltr">ltr</span>'.</p>
+  from other namespaces always end up using <span>the parent directionality</span>.</p>
 
   <div w-nodev>