It might not seem like it by looking at the score.  But the Lakers have shown heart. They’ve shown fight. They’ve shown grit.  Those may seem like crazy statements considering the Lakers have lost all three of their games against the Thunder in their second-round playoff series by an average of 19.7 points, including falling in Game 3, 131-108. But let’s face reality: The Thunder are just vastly superior. LeBron James, JJ Redick and the Lakers trail the Thunder 3-0 in the series, a deficit nobody in NBA postseason history has ever overcome before. Getty Images Lakers coach JJ Redick recently called them “one of the greatest teams ever in NBA history.” LA never had a chance in this series.  It’s fair to wonder if any team can challenge them this postseason.  The Lakers are running uphill against a team that’s jogging on flat ground.…