Sequential Existential Knowledge

Suppose you know, and thereby say - 'This keyboard costs Rs.2000'. 

That means you know : 

1) This keyboard costs Rs. 2000

You know : This keyboard costs.

2) This key board costs Rs.2000

You know : This keyboard exists.

3) This key board costs Rs.2000

You know : about the existence of something.

4) This key board costs Rs.2000

You know : Nothing.

The number of (key)words in the sentence minus 1, is the number of additional pieces (to the original sentence) of knowledge you have! Each sequential step in the expression of knowledge is a piece of knowledge you have.