I&#x27;ve noticed a similar thing about myself when I&#x27;m making plans with friends.  They&#x27;ll say, &quot;Are you coming to XYZ event tomorrow?&quot;  I&#x27;ve noticed that I very rarely answer with &quot;Yes&quot; or a common equivalent even when I fully intend to go.  In the back of my mind I&#x27;m thinking, &quot;How could I possibly know whether I will be there tomorrow.&quot;  I could die, be involved in an accident, or my transportation could be severely delayed.  I usually respond with something like &quot;Probably&quot; or &quot;I&#x27;ll definitely try to make it&quot;.  It doesn&#x27;t have the dramatic impact that this story did, but it echoes the same way of thinking.