1She presumed that her friend was joking when she said she was going to quit her job.
2Do you presume that the new policy will be effective in reducing costs?
3He did not presume to know the answer to such a complex question.
4If you presume that everyone has a smartphone, you might be surprised by the number of people who do not.
5The detective presumed that the victim had been murdered, but further investigation was needed to confirm this.