Evi

The True Knowledge Answer Engine attempts to comprehend posed questions by disambiguating from all possible meanings of the words in the question to find the most likely meaning of the question being asked. It does this by drawing upon its database of knowledge of discrete facts. As these facts are stored in a form that the computer can understand, the answer engine attempts to produce an answer to what it comprehends to be the question by logically deducing from them.

For example, if one were to type in "What is the birth date of George W. Bush?", True Knowledge would reason from the facts "George W. Bush is a president", "George W. Bush is a human being", "A president is a subclass of human being", "Date of creation is a more general form for birth date", and "the 6th of July is the date of creation for George W. Bush", to produce the simple answer, "the 6th of July". True Knowledge differs from competitors like Freebase and DBpedia in that they offer natural language access. Unlike the others however, users who post information to True Knowledge granted the company a "non-exclusive, irrevocable, perpetual licence to use such information to operate this website and for any other purposes".