What is a quote in "There Will Come Soft Rains" that shows it is a robotic house?
The house that is introduced at the beginning of this excellent short story is shown to be robotic through the way that supposedly "normal" life continues to a strict routine without the need of any actual humans, which is ironic given that all of the functions of the house are to help sustain normal human life. Yet, along with the breakfast being made, and the garage door opening, and normal routine carrying on without interruption, no actual humans appear at all in this short and shocking tale. Note how this is shown through the presentation of the robotic cleaners, that pop out after the family, had they been present, would have left the house:
Out of warrens in the wall, tiny robot mice darted. The rooms were acrawl with the small cleaning animals, all rubber and metal. They thudded against chairs, whilring their mustached runners, kneading the rug nap, sucking gently at the hidden dust. Then, like mysterious invaders, they popped into their burrows. Their pink electric eyes faded. The houses was clean.
The house itself through its technology is presented as being a character in its own right, and the extent of the technology, and the way in which the house is able to carry on existing in spite of no actual humans, raises a much deeper and larger question in Bradbury's writing: what does it say about humanity that we are able to invent such amazing technology, but also invent technology that can end the world as we know it, extinguishing all life?