Speed of Static

I have not yet added the experience that led to this idea.

An unchanged appearance does not tell us that everything beneath it is unchanged.

What may still be moving when the surface appears still?

I use Speed of Static as a conceptual expression.

The idea concerns apparent stillness and less visible change, such as pressure, information, deterioration, memory, expectation, or consequences.

A stored document can look the same while its material deteriorates. The example concerns change over time; it does not define a speed for the concept.

Speed of Static is a conceptual expression. It does not define measurable variables or a physical speed.

Different kinds of change cannot be treated as one quantity without a defined model.

Which comparisons help explain an experience, and which make different things seem alike?