Post #3 put the caveat in the right place and I want to underline it. Say what you have already ruled out. "It is not the diluent because I tried a second vial from a different box" saves three replies suggesting the diluent. Happy to expand any of that if it is the useful part.
Second pass at: How to ask a question when you cannot say why you are asking it — setting out what I have, and where I think it stops being reliable.
Checking my reasoning rather than asking for a conclusion.
My current understanding is set out below in the order I arrived at it. I think the second step is the weakest part and I would like that examined before the rest.
Nobody minds being asked to explain a term. The people who use them most are the quickest to define them, and a question that stops to ask is usually a question that gets a better answer.
Narrowing post #3, because the general version has more than one answer.
Avoid "any advice?" at the end. It is so generic that people do not know which part of the post it refers to. Pick the specific part and ask that specific question instead.
This is where my knowledge stops and I would rather mark the edge than blur it.
Post #3 put the caveat in the right place and I want to underline it.
Say what you have already ruled out. "It is not the diluent because I tried a second vial from a different box" saves three replies suggesting the diluent.
Happy to expand any of that if it is the useful part.
Chromatography questions need the method before anything else: column, gradient, wavelength, injection volume. A purity figure with no method attached cannot be discussed, only repeated.
Worth checking against a second source before it gets quoted onward.
If you are asking about a document, quote the exact wording of the line you are asking about. Paraphrasing a specification is how a discussion ends up about a document nobody has read.
Picking up post #7: that is the part I would want checked first.
Quantities without units are the single commonest reason a question sits unanswered. "Two and a half" is not a dose, a volume or a concentration until you say which.
Posting it because the silence on this was starting to look like agreement.
Picking up post #8: that is the part I would want checked first.
Do not apologise in the first line. It costs you the space where the question should be, and nobody here thinks a question is an imposition.
I would rather be precise about what I do not know than vague about what I do.
On post #10 — agreed on the reasoning, with one qualification.
Asking a follow-up: new topic or reply in the old one? If the answer depends on the previous post, reply. If it is a question that makes sense without the previous post, new topic. The second gets faster answers.
Filing this under things that are true until someone shows me otherwise.
A question about somebody else's post should be a reply to that post, not a new topic. A question the post happened to raise should be a new topic linking back to it. The difference is whether the answer is useful without the original.
It took me longer than it should have to see that.
If the answer you got does not fit your case, say which part does not fit rather than restating the question. Otherwise the next reply is the same as the last one.
This follows post #12 rather than contradicting it.
Questions you cannot explain: "I cannot say why I am asking this, but is this compound stable at room temperature?" is more productive than no question at all. People here know that some questions cannot be asked in public and they will work with that constraint.
I would treat that as a working assumption and revisit it.
A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers before you post either.
One of those cases where knowing the mechanism does not help the decision.
If your question has a deadline — a parcel in transit, a delivery you have to accept or refuse — say so. People answer differently when there is a clock on it.
Context that matters: compound, how long in, current dose, relevant history. Context that does not matter: how you feel, your hopes for the outcome, your medical history beyond what affects this specific question. The first set gets you answered. The second set makes the reply longer without making it better.
If that is already documented somewhere, ignore me and link it.
Speaking as somebody who asked badly last month and got a polite request for four missing details: writing the question properly the first time takes ten minutes and saves two days. Learn from me.
When you quote a figure from somewhere else, say where from. Not as a formality — the answer frequently depends on whether the number came from a certificate, an independent report or a forum post.
A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers before you post either.
Answering the question post #19 raises rather than the one it answers.
It is fine to say you cannot explain why you are asking. Nobody will press, and the technical part of the question can usually be answered without the context.
It is worth stating the boring hypothesis before the interesting one.
The arithmetic in post #23 is right; the assumption feeding it is the part to check.
Disagreeing with an answer you got: cite what you disagree with, say what contradicts it, and ask which one holds. Do not open with "I think you are wrong". Lead with the evidence.
Somebody will have a better source than mine, and I hope they post it.
Noted, and I have changed what I was going to do on the strength of it.
Timeline questions need the timeline. Dates, in order, with what happened on each. "A while ago" and "recently" are the two least useful words in a question of this kind.
Two sources, same conclusion, and I could not rule out that one copied the other.
Post #23 describes the usual case. This is about the unusual one.
A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers before you post either.
It is worth checking rather than assuming, which costs nothing.
Units. Everything needs units. This is why we ask every single time. I have seen the same arithmetic done three different ways depending on whether the person was thinking mg/mL or mg/dose or something else entirely. Stating the units makes that impossible.
It is one reading of the data and not the only reasonable one.
Confirming post #27 from a second method, which matters more than confirming it from a second person.
Context that matters: compound, how long in, current dose, relevant history. Context that does not matter: how you feel, your hopes for the outcome, your medical history beyond what affects this specific question. The first set gets you answered. The second set makes the reply longer without making it better.
That is a description of practice, not a recommendation of it.