Thinking about boredom as a "matter of kind" is just a special case of "matter of degree." The degree is just zero or not zero. There are lots of subjects that

Thinking about boredom as a "matter of kind" is just a special case of "matter of degree." The degree is just zero or not zero. There are lots of subjects that I have a cursory interest in, but then I'm done exploring once I've read the Wikipedia page.