<p>Spacecraft systems engineer for over 20 years.</p>

<ol>
<li><p>Sometimes: "knowledge" = "justified, true belief", unless of course one is right but for the wrong reasons, and also perhaps only in the English language, with our specific meanings for those words.</p></li>
<li><p>"In general..."</p>

<p>sometimes "applies all of the time and without exception"</p>

<p>sometimes "applies most of the time, with some exceptions"</p></li>
</ol>

Puffin