Writing · Free lesson
ML English: report an input change without jumping to a conclusion
You inspected 200 input records today and 200 yesterday. Today, 12 have no region value; yesterday, none did. The model owner needs this observation, but you have not tested its effect on predictions.
Professor Scott MendozaThe short answer
Pair an observation with a limit: “Today’s checked sample has 12 records with a missing region value; yesterday’s had none. We have not yet checked whether this affects predictions.” The second sentence prevents an input difference from becoming an unsupported performance claim.
State the observed change before discussing its possible effect.
Checked sample limits the statement to the records you inspected. Missing describes an absent value, not a value of zero. We have not yet checked whether introduces an unanswered question. It does not mean there is definitely an effect or definitely no effect. Avoid “the model is broken” when your evidence only describes input records.
Compare the examples
Of today’s 200 checked records, 12 have a missing region value.
None of yesterday’s 200 checked records had a missing region value.
We have not yet checked whether this affects predictions.
All records and counts are fictional. The lesson practices reporting language, not diagnosing a model or prescribing a technical fix.
Build the meaning step by step
Bound the observation
Of today’s 200 checked records, 12 have a missing region value.
Keep the unanswered question visible
We have not yet checked whether this affects predictions.
Try it now
Keep evidence and uncertainty separate
Read all answers and explanations
Which phrase limits the claim to inspected records?
today’s checked sampleChecked sample identifies the actual scope of observation.
“We have not yet checked whether this affects predictions.” What does this mean?
The effect is still unconfirmed.Not yet checked leaves the question open.
Only the input samples were checked. Which claim goes beyond that evidence?
The missing values definitely caused every prediction to fail.It adds an untested cause and a universal performance conclusion.
Put it into practice
Repair the monitoring note
Today’s checked 200-record sample has 12 missing region values; yesterday’s 200-record sample had none. Prediction impact has not been checked.
The model is broken because the data changed.
See a model answer
Today’s checked sample has 12 records with a missing region value; yesterday’s had none. We have not yet checked whether this affects predictions.
Neither alarm nor reassurance should exceed the evidence.
A little more clarity
Common questions
A few useful details before you move on.
Can I say if instead of whether here?
Yes. After checked, both can introduce this yes-or-no question. Keep not yet so the sentence still says the effect is unconfirmed.
We have not yet checked if this affects predictions.
Is an observed input change proof of worse predictions?
No. Report the observed change and the untested effect separately. This wording communicates what is known without turning an observation into an unsupported performance claim.
We observed more missing values, but we have not checked the effect on predictions.
Take it into your day
Report the input evidence and label the prediction effect as unconfirmed.
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