If there was any doubt as to whether the 49ers have themselves one of the NFL’s elite quarterbacks, it was erased Sunday on two plays within two minutes of each other in a 27-10 road win over the Washington Commanders. It’s first-and-10, and the 49ers have the ball at their own 44-yard line. Purdy takes a shotgun snap and delivers a strike to Brandon Aiyuk for a 38-yard gain. They used to be called dimes. The 49ers call them dots. The coverage wasn’t bad, but it didn’t matter. First down 49ers at the 22-yard line. Three plays later, it’s third-and-9 at the Washington 17. Purdy is flushed from …