To understand the path diagram paper, someone might take three (3) different routes:

1. A student might take multiple courses in statistics and causal inference to learn the concepts. This would take a considerable amount of time and if you wanted to return back to your notes it would take even longer to find the corresponding pages of notes with the concepts. Even if you did find them the information could be outdated, or you won't be able to find the source to learn more.

2. Perhaps they might choose a quicker route and read books to derive their understanding from there. This would bring up a timely issue of flipping through chapters and different sources to connect the ideas. Even when someone finds the corresponding pages it will be nearly impossible to compare two topics side by side, especially if they are in the same book.

3. If someone just wants to settle for a basic understanding and skim through different links and searches on the internet. It may be fast but there will be no organization of ideas, little to no understanding of the connections between concepts, a lack of context for the different concepts, and no direction to learn the concepts deeper if the person wished.