The Curious Case of the Hockey Stick that Didn't Disappear. Part 1: The Police Lineup - But who killed the Medieval Warm Period?

Before we begin the investigation into the usual suspects, some background for people who those who don't follow climate science closely, which certainly includes most of the disinformers and  apparently at least two statisticians.

There is a high probability that the recent warming is unprecedented for 1000 years and probably much longer (see "Sorry disinformers, hockey stick gets longer, stronger: Earth hotter now than in past 2,000 years" and here and here).This conclusion is based on an...