# log (10-log.com)

A log is a record of events over time. People keep logs of workouts, symptoms, or daily activities. A ship's log records where it has been.

## What a model may hear
- logarithm (mathematics and machine learning): Apply a log transform to data, change the base of a calculation, or assume the user wants log-scaled axes or loss functions
- system log (computing and DevOps): Read or write log files, search server logs, or assume the user wants to parse application logs, error logs, or access logs
- logarithmic scale (data visualization and science): Switch a chart to log scale, or assume data spans many orders of magnitude and needs log compression
- log in / login (authentication systems): Confuse 'log' with 'login' or 'log out', and produce authentication code or account access instructions
- timber log (forestry and logistics): Rarely, interpret as a physical wooden log for construction or transport problems

## Where people and models part ways
- Says: "Keep a log of my headaches"
  Means: Track dates, severity, and triggers in a journal
  May be taken as: Create a structured database schema or logging system for medical events, or apply log transforms to pain scores
  Say instead: "Track my headaches in a daily journal with date, severity, and what I did that day"
- Says: "Show me the log"
  Means: Show me the written record of what happened
  May be taken as: Output a system log file, parse syslog format, or assume a specific logging framework like Log4j
  Say instead: "Show me the written record of events, not a computer file"
- Says: "Plot this on a log scale"
  Means: Use a logarithmic axis for the chart
  May be taken as: Correctly understood, but may choose natural log versus base-10 without asking
  Say instead: "Use a base-10 logarithmic scale for the y-axis of this chart"
- Says: "Log the results"
  Means: Write down the results in a notebook or journal
  May be taken as: Generate code to write results to a system log file or structured logging database
  Say instead: "Write the results down in a notebook for me to review later"

## Tips
- Say 'write down' or 'journal' if you do not want code or files
- Specify 'base-10 log' or 'natural log' for math to avoid wrong transforms
- Say 'server logs' or 'system logs' explicitly for computer records, not just 'logs'
- Add 'not a file' or 'in plain text' if you want a readable list, not structured logging output
- Distinguish 'log in' from 'log' to avoid authentication code when you want record-keeping

## Often confused with
- login: authentication versus record-keeping
- logarithm: math function versus daily journal
- logger: software component versus person who records
- log file: computer file format versus any written record
- log scale: axis transformation versus size of wood
- log out: end session versus remove from journal