Chronological Path Stability/Uncertainty Analysis

[npcompl33t]

The clusters as you have split them are not organized by section.

Your clusters are:

1. The 2 herbal A groups 1a / 1b 
   
2. Pharma, some herbal A, and Astro 
   
3. Herbal B, F58, cosmo, and half of stars (3c)
   
4. Another half of stars (4c) and bio
   

So there is not clean section splits here at all, and in fact divides some groups in ways you previously rejected (like splitting stars). 

What then do you think these clusters must represent?