DeeperQA? 

As a cook I often need to find recipes and their closely related variations in the same way a lawyer or doctor may need to find cases and their variations. 

In the past I approached this process by asking the computer questions by means of submitting keywords. Today the method I use is quite different.

Today I find recipes and their variations by query - not by my query of the computer but by the computer's query of me. 

What makes this better is the time I save repeating keyword submissions  to refine responses and find the answer I need.

What makes this possible is the computers ability to minimize the number of questions it must ask.  

The technique is described here.