Record: Decision line, readings kept and struck out, results with probe position, negative evidence with method, reversal condition, 48-hour count.
Take a problem from your diary, or the Haryana case; write the decision you face in one line.
List every possible reading; strike out those whose result would not change the decision.
Take the remaining readings, noting probe position and tool.
Write three things looked for and not found, then the decision and the result that would reverse it.