These are from an LSAT:
- No nonfiction book published by Carriage Book has ever earned a profit. Since Carriage Book earned a profit on every book it published last year, it clearly did not publish a nonfiction book last year.
- No hotel owned by the Bidmore Group specializes in serving business travelers. Since the Cray Springs Hotel is owned by the Bidmore Group, it clearly does not specialize in serving business travelers.
I noted there is a difference in their time frame, 1. concerns what has happened so far while 2. uses the present tense. But does this matter in terms of their logical implication, like in terms of mathematical logic or else?