It gets confusing but stay with me for just a little moment here.
1- Knowns : What you know or think you do. This is what you have personally experienced to be true and can usually be resume by not a lot!
2- Known unknowns: This usually represents subjects within your field of interest, for which you haven't find satisfactory answer yet, in accordance to your Confirmation Bias.
3- Unknown unknowns: This is what will usually kill you. It represent knowledge (Gnosis) for which you have no concept of existence.
Most people would be quite comfortable with a summary listing of items of the second category, which represent a huge proportion of what they know! This would mean the majority of what people think they know is what they don't know!
Enter the third category, composed of everything far too complicated for We the People to even considered. The WHY and the HOW. The thing in an Information based society that enables some few to control WE!
Examples are numerous, Money Creation being one of the most common:
The list is vast and examples would be technical if not scientific in nature, involving entire population survival potential, particularly within today's "advanced" modern society.
In a society where People have no clue about the way technologies on which there lives depend, it is easy for the few to reign as technocrats.
In a world where technology itself competes with the People, it becomes increasingly disturbing to watch the herd awaits.
May you have a Synchronistic life!