<https://www.drscotteilers.com/post/why-we-cannot-simply-choose-happiness-and-what-we-can-choose>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.drscotteilers.com/post/why-we-cannot-simply-choose-happiness-and-what-we-can-choose>