1.   But he also speculated on much wider issues.

2.   Edward began to speculate on what life would be like if he were single again.

3.   Encourage them to speculate on why some students heard the sound before others.

4.   Her father made his money speculating on the New York Stock Exchange.

5.   I would here like to give two examples of such skewed populations and to speculate on the seeming anomaly.

6.   In spite of a host of imponderables it is possible to speculate on the composition of some of the smaller properties.

7.   It is interesting to speculate on the possible reasons for his total obscurity during the intervening years of the Restoration.