1.   For the most part this is a reasonable assumption to make.

2.   Given a few reasonable assumptions about f, it is guaranteed to find a best path from the start to a goal.

3.   It is a reasonable assumption that she knew him well, as she had the keys to his house.

4.   This is a reasonable simplistic assumption, but it is the best that will normally be possible.

5.   This seemed like a reasonable assumption.

6.   It is a reasonable assumption that improvements can be made even to the best of schools.

7.   She was on the verge of ignoring the summons, on the reasonable assumption that the visitor had pressed the wrong buzzer, when it sounded several more times.

8.   The Arrow Impossibility Theorem suggests that it may be futile to attempt to build it up from reasonable democratic assumptions.

9.   Another rule would require actuaries to attest that the company is using reasonable assumptions in its illustrations about its expenses and costs of paying death benefits.