But there is doubt about this, though he knew some of the conspirators who were hanged.
Q: Do you accept that there is doubt about whether you can deliver these contracts?
The reason, he said, is doubt about the outlook for the wireless business.
But where there is doubt about who is really the boss, there is always potential for trouble.
There is doubt about their earnings, their products, the way they sell and whether they are correctly structured.
There is doubt about the ratio, so the study applies a range of formulas for its calculations.
The only reason not to buy Riley's 636-page dictionary-cum-encyclopedia is doubt about the strength of your bookshelves.
Underlying all of this is doubt about whether Flintoff will again play top-level cricket for anyone.
Probably the biggest obstacle to creating the airport equivalent of an E-Z Pass is doubt about its effectiveness.
But there is doubt about which iPads will sell best — the new iPad Air, which is the larger and more expensive model, or the iPad Mini.
If there is doubt about there being a new sheriff in town, it was dispelled in a disarmingly brief 90 minutes.
