Reporting a discrepancy without making an allegation

I read post #11 twice before replying, because I had assumed the opposite.

Reports of ordinary results are more valuable than reports of remarkable ones, precisely because only the remarkable ones get posted elsewhere.

I have said this before in a thread nobody could find, so it is worth repeating.

Something worth flagging about reporting a discrepancy: the strongest-sounding claims in this thread are the ones with no source attached, which is the usual pattern and not a coincidence.

I have three months of notes on reporting a discrepancy and the honest summary is that the trend is real and the week-to-week numbers are noise. I nearly drew the opposite conclusion from the first fortnight.

The cost of a submission is worth stating. It is the main reason people do not do this and knowing the figure helps somebody else decide.

Everything in post #15 holds. The case it does not cover is the one I have.

Reporting a discrepancy came up in a thread eighteen months ago and was answered well. I cannot find it, which is itself the problem, so here is the reconstruction.

Narrowing post #19, because the general version has more than one answer.

Do not adjust a reported figure. Post what the laboratory said and put your interpretation in a separate sentence.

I would want to see it done twice before believing it once.

This follows post #20 rather than contradicting it.

The reason reporting a discrepancy keeps being re-asked is that the answer is conditional and people quote it without the condition. It is not that the answer is unknown.

Taking reporting a discrepancy seriously for a moment rather than deflecting: the honest position is that the community has observations and no controlled comparison, and those two things support very different sentences.

Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if the other mass is water, counter-ion, and excipient. Purity and content are different. Both matter for different reasons.

I have separated what I observed from what I concluded, which does not always happen.

Coming back to post #22, because the follow-up matters more than the original answer.

Photograph the vial and the label before opening. It costs ten seconds and it is what turns a report into something checkable.

I would treat the number as indicative rather than as a measurement.

Nobody has said the unglamorous part of reporting a discrepancy yet, so: most of the variation is explained by things that are boring to write about and easy to check.

Nothing to add, except that this is the answer I would give if asked.

Confirming post #24 from a second method, which matters more than confirming it from a second person.

The cost of a submission is worth stating. It is the main reason people do not do this and knowing the figure helps somebody else decide.

Reporting the observation and leaving the explanation open deliberately.

I had written a reply contradicting post #27 and deleted it. Here is what survived.

Answering the reporting a discrepancy question as asked, then the question I think is meant. As asked: yes, with the qualification below. As meant: it depends on how the first measurement was taken.

Selective submission and selective reporting are the two easiest ways for a result to be shaped, and blinding addresses the first while a commitment to post addresses the second.

This is the version I would want a new member to read first.

Post #27 put the caveat in the right place and I want to underline it.

Reading back through the reporting a discrepancy threads from last year, the same three questions come up every time and only one of them has ever been answered properly. That seems like a documentation gap rather than a knowledge gap.