Introduction The sun will rise tomorrow.  This seems to be an uncontroversial statement.  The sun came up today, and the sun came up yesterday, and the day before that.  Just as it has for millions of days before that.  Gravity held today, just as it has held since the formation of the universe.  This is, again, another uncontroversial statement.  We often predict future events based on generalisations of past experiences.  It is how science works, and it is how science......