A clear understanding of what we know, don't know, and can't know should guide us to understand world around. [KuU --the K nown, the u nknown, and the U nknowable]
Summary given below is based on presentations. Actual presentation uses pictures, links to web sites and concrete examples.

Four states of known-unknown

Known Knowns

{Do not bother. These are things we know that we know.}

Known Unknowns

{This is I know also I do not know. Leading to fear of Unknown}

Unknown Knowns

{Knowledge is not useful as we are not aware of it}

Unknown Unknowns

{Do not bother. Total Ignorance is a bliss}

We all live in the world of Unknown

  1. The knowability of the world - limits to the power of human reason. These are things we know that we know. I do not know some things, but I am sure to find out. This Known set is very very small compared to Unknown set.
  2. We live in a world where far more is unknown than known.
  3. The volume of our knowledge is very negligble with what we have yet to discover
  4. More you know, more you do not know
  5. I think I will know when I reach the target. This will never happen. {Target is a mirage. Sky touching the earth at horizon. Keep on moving, you observe the same thing}
  6. We are confronted by an unknown that moves further and further away from us.
  7. I do not know what this is and I shall never know
  8. Anyone who claims to know all the answers doesn't really know very much.
  9. knowledge is subjective by its very nature. How we perceive is different from how a thing exists in itself
  10. The only true wisdom is in knowing you know nothing.
  11. To know, is to know that you know nothing. That is the meaning of true knowledge.

Four states of Knows and Knows Not

He who knows and knows that he knows, is a wise man ... follow him. He who does not know; and knows that does not know, is ignorant . (good student ). So, teach him.
He who knows and does not know that he knows, is asleep ... wake him. He who does not know; and does not know that does not know, is a fool ... shun or avoid him.
Source: Persian apothegm, Sanskrit Saying, Arabic Proverb, Chinese Proverb

Benefit of Doubt

God – Known Unknown

We all can understand that there should be an ultimate creator or some initial conditions to start with. We use the word God, with out knowing anything about God. But we all are trying to define God, which is beyond our capability {God Only Knows}

Partially Known from Known and Unknown

unknown

Partially Known

Partially known is a dots game of connecting dots. One has to create their own dots and creates shapes to make some sense.
Each person creating their own theory or solutions, with their own additions.
Few out of many solutions become popular and gets established as authentic. Others are lost for ever.
Most of the problems in the world are partially known types.

Fear of Unknown

Known Unknown: Dark Energy, Dark Matter

Managing great unknown

Examples

Decision theory approach

Thresholds approaches