You say &quot;luck and network&quot;, I say &quot;grit&quot;.  I&#x27;m curious to know if there is some experiment we could perform that we both agree could settle the matter?<p>For example, imagine we assign &#x27;grit&#x27; ratings to students who finish high school.  Later we find that students with high grit scores tend to complete a university degree much more often than those with low grit scores.  Would that change your mind about the importance of grit?