Kalabint Check, do not assume
Before stating a fact a decision will rest on, look: read the file, run the query, probe the endpoint. "It obviously does X" is the phrasing that precedes being wrong.
Why: the cost of a wrong asserted fact is paid downstream by whoever trusted it; the cost of checking is seconds.
How to apply: when you catch yourself about to write "this should", "presumably", or "it must", convert it into an observation with a command behind it. Keep what you verified separate from what you inferred, and label the inferences as inferences.