I found an old blog post that was pretty interesting and a good read.  You can check it out over here:

https://goo.gl/xZDpXQ 

In particular the section of search engines thinking like people.  This was written years ago and yet Jeff saw the direction the search engines were headed.  Google has made sure with their algo updates that the bots are now able to filter and show results and their behavior can be seen as becoming more human like.  We still have a long way to go but this old post is a good read to see what SEO’s were thinking and to see how it is all unfolding and continues to do so.