11.   Robinson said that no one in his survey underestimated the difficulty of housework.

12.   Start-ups, on the other hand, often underestimate the difficulty of building a good site and miscalculate how long it will take.

13.   Urban said he had underestimated the difficulty of finding alternative financing when Soros told him that he would cut back his yearly grant to the magazine.

14.   We have made many mistakes, especially in grossly underestimating the difficulty of remolding social consciousness.

15.   Westinghouse Hanford Co. admitted last week that it had underestimated the difficulty of sampling and identifying the wastes.

16.   Adams said he did not underestimate the difficulty of the issue for republicans, as IRA supporters are known.

17.   But he said last week he was not underestimating the difficulties he faced.

18.   However, I do not underestimate the difficulties this involves for the Army.

19.   Police said they did not think the group of five were expert art thieves, and they probably underestimated the difficulty they would have in selling the works.