The Lakers are aware of the daunting task in front of them: defeat the reigning champion Thunder in their own building without their best player on the court. On Tuesday in Game 1 at Paycom Arena, the Lakers seemingly had a golden opportunity to steal at least one game in this series. Lakers had their opportunities to steal Game 1 of the WC semifinals, but self-inflicted wounds and poor shooting proved fatal in the end. AP They jumped out to an early lead. They held reigning MVP Shai Gilgeous-Alexander under 20 points for the first time in almost a year. They were winning the turnover battle midway through the third quarter.  The Lakers were measured, tested, and through it all they revealed the truth about themselves. They cannot hang with the Thunder.  The 108–90 final score doesn’t even tell the full story. It was the Lakers sixth straight loss against OKC over the past two seasons. The average margin of victory fell to 27 points.…