1.   In the concluding section we shall speculate as to why this might have been.

2.   Maclean had no locus standi for this lightning intervention, and one can only speculate as to his reasons for it.

3.   Many of us speculated as to his reasons.

4.   We speculate as to what will happen to the characters in later years.

5.   He speculated as to whether she would come.

6.   A rock inscribed with mysterious glyphs that some have speculated as being of Norse origin.

7.   Epileptologists have long speculated as to what governs the transition from the interictal to the ictal state.

8.   When the MoD was the sole source of information, the press could only speculate as to the veracity of its statements.

9.   An agreement with Polar had long been speculated as the best way for Pepsi to return to Venezuela.