You can measure human emotion and engagement with simple patterns.
You just have to trace the pattern of the replies, to see how flat the structure is, how many people are involved in the different levels of the structure, and how grammatically complex and diverse the replies are.

GM
- GM
- GM
- GM
- GM
- GM
- GM
- GM
- GM
- GM
- GM
- GM
- GM

Groundbreaking topic
- Complex note from npub 1
-- Complex response to npub 1 from npub 2
- Complex response from npub 1 from npub 3
- Complex note from npub 4
- Complex note from npub 1
-- Complex response to npub 1 from npub 2
- Complex response from npub 1 from npub 3
- Complex note from npub 4
- Complex note from npub 1
-- Complex response to npub 1 from npub 2
- Complex response from npub 1 from npub 3
- Complex note from npub 4