I read <i>all</i> five sentences <i>and</i> the single sentence fragment in your statement several times before replying. :)<p>If your thesis is &quot;Complex and&#x2F;or difficult software is <i>hard</i> to get right.&quot;, I agree with it. I don&#x27;t think <i>any</i> experienced programmer would disagree with it.<p>If your thesis is -as it appears to be- &quot;Complex and&#x2F;or difficult software is <i>impossible</i> to get right.&quot;, I cannot agree with it. It is often difficult and time consuming to create correct complex software, but <i>far</i> from impossible.