4. The method of claim 2 further comprising: second detecting that the particular result label displayed in the legend has been selected; and responsive to said second detecting, augmenting the visualization to include explanatory information pertaining to the particular result.
4. The method of claim 2 further comprising: second detecting that the particular result label displayed in the legend has been selected; and responsive to said second detecting, augmenting the visualization to include explanatory information pertaining to the particular result. 5. The method of claim 4 wherein the explanatory information includes evidence extracted from corpora used by the cognitive system to arrive at the particular result.