There are serious doubts creeping in about how big this season's crop is going to be.

We have serious doubts about the place and type of operation that our personnel were involved in.

I don't have any doubts. Zero doubts.

The creeping notion that additives are badditives.

These figures again raise doubts over the [Bank's] assertion that GDP is being under-recorded.

People forget that when you're 16, you're probably more serious than you'll ever be again. You think seriously about the big questions.