Why a date is not always enough

An original exposition about an invented record-keeping exercise.

Two notes in the trial log carried the same date. One recorded that a door had been left open; the other recorded a fall in the room's temperature. A reader assumed that the open door explained the colder room. The writer of the notes pointed out that the temperature had fallen in the morning, several hours before the door was opened.

We added a space for the time beside each date. The extra detail did not explain the temperature change. It prevented the log from suggesting a sequence that had never happened.

A record can be accurate in each individual entry and still encourage a mistaken account when the entries are read together. The problem is not always a false statement. Sometimes it is a relationship that the page allows the reader to invent.

This does not mean that every note requires a precise minute. A list of books read during a year may need no such detail. The choice depends on the questions the record is expected to answer. If sequence matters, a date can group events too broadly; if it does not, unnecessary precision may make the page harder to use.

How does the writer explain the importance of recording time when the order of events matters?