Wolfram is able to write it in such a way that somehow it is mostly about him. :-( There is some overlap between Cyc and his Alpha. Cyc was supposed to provide

Wolfram is able to write it in such a way that somehow it is mostly about him. :-( There is some overlap between Cyc and his Alpha. Cyc was supposed to provide a lot of common sense knowledge, which would be reusable. When Expert Systems were a thing, one of the limiting factor were said to be limited amount of broader knowledge of the world. Knowledge a human learns by experience, interacting with the world. This would involve a lot of facts about the world and also about all kinds of exceptions (Example: a mother typically is older than its child, unless the child was adopted and the mother is younger). Cyc knows a lot of 'facts' and also many ways of logic reasoning plus many logic 'reasoning rules'. Wolfram Alpha has a lot of knowledge about facts, often in some form of maths or somewhat structured data.