|Implicit knowledge (U)||Explicit knowledge (E)|
|Example||The implicit knowledge used to recognize the face of a specific person.||The explicit knowledge (e.g., textual descriptions) that would allow to recognize faces of people (including a specific person).|
|Complexity, Context retention||
Rich, grounded in reality.|
High retention of context in form of salient features.
Lean, more abstract, symbolic.|
Variable amount of context retention.
|Acquisition||Detection, learning of correlations and regularities of environment.||
Explicitation of one's implicit knowledge.|
Explicit acquisition of knowledge (e.g., through reading).
|Representation||Unstructured, present implicitly in data recordings of the environment (e.g., image of a person).||Varies from less structured (e.g., natural language) to very structured (e.g., formal descriptions).|
|Transferability||Transferable only in implicit form through the data recordings (i.e., representations) of the environment.||Transferable through languages (natural or formal) and communication (e.g., verbal).|
|Applicability||Very well applicable to specific problem instances.||Applicable to both, specific and more generic problems.|
|Processing mechanisms||Pattern recognition, feature selection, associative memory.||Reasoning.|