Inert Historical Facts

Dennett examines historical facts that leave no discernible trace in a later state, using digital information preservation and discarded physical distinctions as examples.

An inert historical distinction is one that leaves no discriminating trace relevant to a specified later state. Digital copying provides a useful idealization: two identical bit streams need not reveal which physical carrier supplied them. The historical question can remain meaningful even when the available representation cannot answer it.

This is stronger than saying a fact feels irrelevant or has not yet been measured. Before declaring history inert, look for logs, metadata, material differences, and downstream dependencies. In practical work, state the boundary of the claim: indistinguishable in this record or for this function is more defensible than no possible consequence anywhere.

When to use it

Use when interpreting provenance, information loss, digital copies, or arguments that every microscopic historical difference must affect a later computation.

How it can help

Ask whether the available state can distinguish competing histories. Identify retained traces and make the boundary of any information-loss claim explicit.