A habit that holds

Seven lessons of technique are worth nothing if they only run when you are calm and unhurried. Verification fails in exactly the conditions that make it necessary — deadline, pressure, an answer you wanted.

So this lesson makes it small.

Three questions

The whole module, reduced to what you can actually run:

1. Does this matter if it is wrong? If no, stop. You are allowed to not check things.

2. What is the primary source, and does it say this? Open it. Read the sentence in place.

3. Would I be checking this if I disagreed with it? If no, check it now.

Question one is the volume control. Question two is the work. Question three is E7·L7 in a form you can apply in ten seconds.

That is the module. Everything else is elaboration you can return to.

Three standing rules

Decisions made once, so they need no thought later.

Never repeat a citation you have not opened. No exceptions. This one rule prevents the most common and most reputationally damaging failure available.

Never verify a model with the same model. “Are you sure?” is not a check.

Verify important requests out of band. E7·L6’s rule, and it applies to money and access regardless of how convincing the message was.

Saying what you do not know

The other half of this module, and the part people neglect.

Verification is not only about what you believe. It is about what you assert — and once you check properly, you will frequently end up less certain than the people around you. That is a strength, and it needs to be expressed as one.

Vague hedging sounds like you did nothing:

“I think it might be around 15%, but I’m not sure.”

Specific uncertainty sounds like exactly what it is:

“It is 15% for the UK in 2025 — that is from the ONS release, which I checked. I have not confirmed whether the same definition applies in the other markets, and if it does not, the comparison in section 3 does not hold.”

The second is more useful and more authoritative, despite claiming less. It tells the reader what to rely on, what not to, and what would change it.

Name what you checked, what you did not, and what would change your answer. That formula converts uncertainty from a weakness into information.

Why the Certificate route requires this module

The Lrnon Certificate requires E7, and the reason is narrow.

Everything else in Explorer makes you faster. Faster is only good if the output is right, and every other module quietly assumes this one. E4’s routine assumes you check. E5’s documents assume you recompute. E6’s disclosure assumes you can tell what is real.

Without this module, the rest of the curriculum makes you a more efficient source of confident errors — which is worse than not having taken it.

Try it now (5 minutes)

Write the three questions somewhere you will see them.

Then take a claim you plan to use this week, run all three, and write your answer in the “what I checked, what I did not” form. Notice that it reads as more competent than a confident version, not less.

Check your understanding

1. The third standing question — 'would I be checking this if I disagreed?' — exists to: Slow down your reading Catch asymmetric scrutiny in ten seconds Decide which source to use

2. Which statement is strongest? "It's about 15%, but don't quote me" "15% for the UK in 2025 from the ONS release, which I checked; I have not confirmed the other markets" "It's 15%"

3. The Lrnon Certificate route requires E7 because: It is the longest module Every other module assumes it — without it the curriculum makes you an efficient source of confident errors Verification is legally required

Recap

Three questions — does it matter, what does the primary source say, would I be checking this if I disagreed — plus three standing rules: never repeat an unopened citation, never verify a model with itself, always confirm important requests out of band. Then state uncertainty specifically, naming what you checked and what you did not. That completes E7, the module the rest of the curriculum depends on.