That was a crushing loss for the USC Trojans. All losses are not the same. Some losses end a championship season that is within reach. Texas. 13-9. Notre Dame 1988. Those losses live forever. Some losses are disappointing but still leave hope for a great season. The Michigan loss was like that. Losing to Michigan left no margin for error, but all of the realistic goals—including the playoffs—were still in sight. Or so it seemed. And some losses just show you that you didn’t really understand your team and that your hopes were deeply unrealistic. After those losses, you watch the games and love…