it is doubtful that

If you had not, it is doubtful that you could have reversed the trends towards self-destruction.

It is doubtful that either of the parties, in their present mood, can be aligned with that objective, but Mr Obama's only course is to try.

Restricting where sex offenders can live is supposed to keep them away from potential victims, but it is doubtful that this works.

Finally , it is doubtful that such a system could be other than heterogeneous .

Whatever Chinese intentions are, it is doubtful that China will have the military capability to expel the United States from East Asia.

It is doubtful that the clubs could sell so many scarves or charge so much for tickets without the marketing boost provided by television.

it is doubtful that the huge investments needed to develop new products would be made without the prospect of patent protection.

But it is doubtful that the economics of online or mobile video will ever be as attractive as the economics of traditional television.

It is doubtful that Microsoft bought the company just to enhance Live Search.

It is doubtful that anyone among a handful of potential successors could command as much local respect.

It is doubtful that the diffusion or ideal mixing stage models can satisfactorily represent the behavior of gas in fluidized beds.

It is doubtful that the rescue team will find the missing man in this weather.

As with the internet , it is doubtful that such a large system would have a single domain of authority .

It is doubtful that Washington could simply order Georgia to drop its objections.

It is doubtful that the missing airmen will ever be found.

It is doubtful that I will be able to find a market for more expensive products.

It is doubtful that legislation can work in such an arena.