It seems people tend to lump things into site-level concepts. That false notion about search engines indexing and ranking websites is where most of the SEO confusion seems to stem from. Search engines do not index and rank websites, they index and rank individual web pages.
Websites do not have PR, and that naive notion, about site-level factors, is behind a large portion of SEO confusion and myths.
Note that he always refers to PageRank as a factor that applies to individual pages, never to websites.
As you read through threads on this forum you will see many discussions where posters constantly refer to the website’s PR. There is no such thing.
I have found the most reliable barometer of a Warrior Forum member’s SEO knowledge is to note whether his posts are consistent with that simple fundamental concept of how search engines actually work. Invariable, those that have the intelligence to understand that concept, and demonstrates that this basic knowledge of SEO is internalized in his thinking, is a fairly reliable sign of someone who actually understands SEO, for how can you formulate accurate knowledge and reasonable theory, without understanding the most basic fundamental knowledge?
Can you actually truly understand more advanced concepts if you haven’t even understood or accepted the basics? Are not all advanced concepts built upon the basics? Without an understanding of the fundamentals, you will likely end up going down the rabbit hole.