If you were to ask me if I'd ever had the bad luck to miss my daily cocktail, I'd have to say that I doubt it; where certain things are concerned, I plan ahead.

If it doesn't work out there will never be any doubt that the pleasure was worth all the pain.

One can't doubt that the American objective in Iraq has failed - different plans have to be made. And the kernel here is the acknowledgement of defeat.

I don't doubt a number of those ballots, of those votes that were cast for me, probably were intended for Vice President Gore.

And I mean I never doubt anybody's record.

I doubt whether the world holds for any one a more soul-stirring surprise than the first adventure with ice-cream.

Dissent is the native activity of the scientist, and it has got him into a good deal of trouble in the last years. But if that is cut off, what is left will not be a scientist. And I doubt whether it will be a man.

There's no doubt that scientific training helps many authors to write better science fiction. And yet, several of the very best were English majors who could not parse a differential equation to save their lives.

But my doubt would not be overcome. Kierkegaard had declared that it was only to the consciousness of sin that Christianity was not horror or madness. For me it was sometimes both.

There can be no doubt that the transportation sector is the most critical sector of our economy.

But what of black women?... I most sincerely doubt if any other race of women could have brought its fineness up through so devilish a fire.

When in doubt wear red.

If the Sun and Moon should ever doubt, they'd immediately go out.

During my six years with them Dr Garnet Davey (subsequently Research Director) constantly supported me and, I have no doubt, fought many battles on my behalf to keep the initially controversial programme going.

No doubt unity is something to be desired, to be striven for, but it cannot be willed into being by mere declarations.