Then they can, for instance, pass over gap and steps where a single robot would have failed.

The robot continuously tries to rise, as if doing a sit-up, but always fails.

Attempts to communicate with the robots fail as they vaporize anyone that tries to attack them or even fires a rifle to get their attention.

Buick's robots either failed to deliver what was promised or they broke down.

The robots failed to show up, and the noise outside grew much louder.

Only the humanoid robot in the audience failed to see the humor of it.

Except that a robot might fail due to the inherent inadequacies of his brain.

And if our robot failed and was questioned, he would certainly go into irreversible block.

It was bad enough that she had refused to help create another monster after the robot had failed.

Their suspicions aroused, they'd called up the Turing test, and the robot had failed it miserably.