premise: Westfield Corporation is an Australian-based British-American shopping centre company with retail destinations in England and the United States. It was created in June 2014 when Westfield Group separated its Australian and New Zealand businesses from its international operations.
hypothesis: Westfield Corp. didn't exist prior to June 14th, 2014.
reason: We only know that it was created in June 2014..we don't know which day of the month it came into existence. 