Such a manipulative experiment would be considered impractical, illegal, and immoral.
Delivery by the Navy was considered impractical, leaving relief flights as the best option.
"When we first began our research, solar cells were considered impractical and quite expensive," Mr. Mazumder said.
Uranium-233 was manufactured decades ago from thorium, and can be used in weapons but is now considered impractical for that purpose.
It started as a controversial experiment in the social effects of art and design, producing ideas that were often considered impractical, uncomfortable and costly.
No doubt our specific ideas would be considered impractical for a Union of 25 member states, all with interests and ideas of their own.
A full election with a vote for all adults is considered impractical for security and institutional reasons, so Somalia's next president will be selected by members of a bicameral national assembly picked by 14,000 delegates chosen by tribal elders.
Now, fitting a reasonable amount of hydrogen into a regular-size fuel tank requires that the hydrogen be squeezed to very high pressures, creating a potential hazard in a collision, or cooled to very cold temperatures, considered impractical and inefficient.
It is expected to serve as a further model for other grains like wheat and corn, which have genomes that are so large and full of nonfunctioning DNA that they are considered impractical to sequence.
"New and advanced exploration, well drilling and completion technologies are allowing us increasingly better access to domestic gas resources — especially 'unconventional' gas — which, not that long ago, were considered impractical or uneconomical to pursue," said John B. Curtis, a geology professor at the Colorado School of Mines and the report's principal author.
But in World War I, although parachutes were used with great frequency by men who needed to escape from tethered observation balloons, they were considered impractical for airplanes, and only in the last stage of the war were they finally introduced.
