Hi Jacob. Paul Graham's comments are only accurate if you apply reflective practices and gain the learning. There might be some learnings, but they are inconsistent, weak and and easily lost. If you only have one conversation a day, then you'll probably think about it later that day. Taking notes allows you to reflect on it later, especially if you have a busy schedule. Jarvis talks about this, but you'll see reflection being promoted as a necessity in many learning theories

https://books.google.com/books/about/The_Theory_Practice_of_...