What makes a good analogy? Is Tyrion Lannister a good comparison for Michael Gove?

Things mentioned in this podcast

Michael Gove is like Tyrion Lannister: https://news.sky.com/story/is-environment-secretary-michael-gove-really-like-his-game-of-thrones-soulmate-tyrion-lannister-11559555

Funes, the Memorious by Borges: https://marom.net.technion.ac.il/files/2016/07/Funes-the-Memorious.pdf

Cartesian geometry: https://en.wikipedia.org/wiki/Cartesian_coordinate_system#History

Sarah Palin - debt is like slavery: https://www.theatlantic.com/politics/archive/2013/11/palin-isnt-racist-debt-slavery/355165/

Image: Chris McAndrew via parliament.uk