Why Commonsense KBs are not "human" -

A note on the "Cognitive-compatibility" of commonsense KBs

Commonsense KBs contain statements like - Soaps are materials used for cleaning things. (Or, Cars are large, external things used for transportation; or 'Trucks are large, heavy surface level vehicles which can't control their altitude).

This is an effective, technical summarization of one's knowledge about soaps, cars and trucks. This is constructed with logical articulation. This is "thought-out" (is after applying thought).

What we actually know about soaps (and also the ways in which we know it) is as follows - 

Soaps are mostly solid and come in different colours. Sometimes they are liquid.

We require soap to have a bath.

We rub soaps quite hard, to and fro, on our bodies (and other bodies).

Soaps need to be applied with water.

When we rub soap, we get lather. The lather has to be washed off later.

When we apply soap to something, it gets cleaned.

The above are the actual (so to speak), knowledge-bits stored in our minds, about soaps. They are fragmented, fuzzy, practical, kluge-like, reflective of our real-life experiences with soaps, etc. Whereas the entries in the present KBs are technical aggregations of the properties of entities/concepts. That is certainly not how knowledge is stored in our brains. Ask a kid about a soap, or see the occurrences of the word 'soap' in his linguistic-expressions and his thoughts and they will resemble the list above. This list is reminiscent and indicative of the real ways and forms in which we have cognized the knowledge about soaps, in our minds, in life.