- I bought this house not because I want to live in it but to sell it later at a good price, so I am speculating.
- I mulled over the events of the afternoon.
- philosophers have speculated on the question of God for thousands of years.
- Scientists supposed that large dinosaurs lived in swamps.
- The scientist must stop to observe and start to excogitate.
- We were speculating whether the President had to resign after the scandal.