Otherwise, one would be weak of faith and doubtful in conviction.

It was doubtful, in the modem day, though he wouldn't have said so a few years earlier, before the big changes.

The location of this beach was not doubtful in my mind.

He is doubtful McDonald's can achieve that gain in market share.

It is doubtful, in any case, that she knows or cares much about the world around her.

I am "doubtful" in any case that it has to do with their "race".

He wanted to laugh; she was at once so doubtful and yet so in earnest.

Whether it would have been possible to achieve this quick success in another year or two is, I must say, very doubtful in my opinion.

The premise of accepting Japanese training is doubtful in the eyes of some.

Whether the industry contributes to wider benefits is very doubtful, in my view.