Homonym: black box (Mystery)
A "black box" refers to a system or device whose internal workings are not visible or understood, but its inputs and outputs can be observed. This term is commonly used in various fields, including engineering, computer science, and psychology, to describe processes that are complex or opaque.
In aviation, a black box, or flight recorder, captures data about an aircraft's performance and cockpit conversations during a flight. This information is crucial for investigating accidents and improving safety measures, even though the exact mechanisms of the device itself may not be fully understood by all users.