1.   But you could rarely be absolutely certain.

2.   By far the most turbulent stream belonged to Wang Tai himself-Gao Yang was absolutely certain of that.

3.   Consciousness, without any further necessary conclusions, is the only fact of which consciousness can be absolutely certain.

4.   In a profound sense we doubt not only because we are ignorant of something but because we are absolutely certain of nothing.

5.   It is impossible for me not to be absolutely certain of it.

6.   No state requires that you be absolutely certain, before you file a report, that abuse is taking place.

7.   Nor is it absolutely certain that that experience differs in any fundamental way from that of past eras.

8.   We have to make absolutely certain that none of this gets out.

9.   So we can make absolutely certain on the recording.

10.   The delay has been due mainly to the need to be absolutely certain about the integrity of the flight control system software before the aircraft takes to the air.