Kevin "Jack" Haugrud was the acting United States Secretary of the Interior, serving since the end of the Obama administration on January 20, 2017 until the swearing in of Ryan Zinke on March 1, 2017. Until becoming Acting Secretary, Haugrud was deputy solicitor of the Department of the Interior.

Based on that paragraph can we conclude that this sentence is true?
Jack is a very uncommon nickname for someone named Kevin.
It's impossible to say