A computer is a general-purpose machine with which we engage to do some of our deepest thinking and analyzing. This tool brings with it assumptions about structuredness, about defined interfaces being better. Computers abhor error.

In this quote, Ellen Ullman reflects on the nature of the computer as a general-purpose machine that serves as a powerful tool for thinking and analyzing. Ullman highlights how we engage with computers to help us solve complex problems and process information, making them essential to many of our intellectual activities. The quote underscores the versatility of computers, which can be used for a wide range of tasks, from creative endeavors to scientific calculations.

Ullman also brings attention to the assumptions embedded in the way computers function, particularly the idea of structuredness and the preference for defined interfaces. This refers to the notion that computers operate best in environments where rules and systems are clearly defined, and there is little room for ambiguity or uncertainty. These structures help the machine function efficiently, but they also limit the ways in which humans can interact with them.

The quote further touches on the idea that computers abhor error, meaning they are designed to avoid mistakes and require exact inputs to function correctly. In a way, computers demand perfection, and their failure to handle even small errors can cause them to break down or produce incorrect results. Ullman’s words highlight the tension between the logical, error-free world of machines and the often messy, imperfect nature of human thinking and decision-making.

Through this reflection, Ullman emphasizes the inherent limitations of relying on computers for complex tasks that demand creativity and flexibility. While computers are invaluable tools, their strict need for precision and their preference for order may not always align with the chaotic, unpredictable nature of human thought.