The Hierarchical Modeling System

[@benherman3021]

This is a fantastic series. Many thanks for making and uploading it.

[@郭奇涵]

Lecture starts at 10:10

[@RaynerDaCruz]

Incase someone still doesn't understand the concept or wants a short summary of what is being said here, watch this video: /watch?v=rXoGR5pobG4

[@MilesBellas]

The intros need to be edited and start when the lecture starts.