<p>From the <a href="https://stats.stackexchange.com/help/privileges/comment">help page on comments</a>:</p>
<blockquote>
<p><strong>When <em>shouldn't</em> I comment?</strong></p>
<p>Comments are not recommended for any of the following: ...</p>
<ul>
<li>Compliments which do not add new information (&quot;+1, great answer!&quot;); instead, up-vote it and pay it forward; ...</li>
</ul>
</blockquote>
<p>Your comment did <em>not</em> say &quot;he was correct.&quot;  The record shows it said (in full)</p>
<blockquote>
<p>@LazyCat right.</p>
</blockquote>
<p>That is ambiguous.  I interpreted it as not adding new information.</p>
