Take the following as truth: A Midwesterner, Will Hays, Jr., who is proud of his knowledge of post-Civil-War history, tells me the following origin of shot , as in shotglass , absent from  Gunning for the English Language :
Then the following statement: "Will Hays Jr., who is a Midwesterner, knows how the word shot came to be in the form "shotglass"." is true, false, or inconclusive?
Answer: True