Clarifying the Different Types of Sources of Information

I'd be willing to bet that a good number of beginner genealogist and probably a surprising number of more experienced genealogists don't have a good grasp of the different types of sources of information. I know I never really thought of it before and prior to really thinking about it, I'm pretty sure I had a couple of these types confused. There are six categories you can put sources of information into. These are three sets of opposites. Any given source can be classified as one of each of these pairs so each source is actually in three of these categories, all at once.

Ancestry Snapshot - 1818

I came up with an idea of what to use as a basis for a blog post. I'm not sure if anyone has done this before so if they have, I'm not stealing the idea. It just came to me. What I'm going to do when I'm searching for a blog post is to select a year and document where every branch of my family tree is and what they are doing. As much as I know anyway. I believe the toughest part of this is to choose a year. For my first Ancestry Snapshot year, I'm selecting 200 years ago, 1818. Also, if you have a better name for this challenge, let me know.