explanation
 
 
A structure, act, or process that provides understanding.
 

Details:
 
Furnishing explanations is one of the most important activities in high level cognition. The nature of explanation and its role in thinking have been addressed by philosophers, psychologists, and artificial intelligence researchers. Inference to the best explanation can be understood in terms of maximizing coherence among competing hypotheses and evidence.
 
 
Paul Thagard