One thing that is still open after SarahChen_PharmD’s answer:
How would you tell the difference between that and the alternative explanation?
quinn_sf said:If you are comparing against somebody else’s result, check that you are comparing the same measurement taken the same way.
I read this differently from quinn_sf, on substance rather than tone. The counter-case has not been addressed. Somebody upthread described the situation that does not fit, and the thread moved on rather than engaging with it, which is the failure mode this board is supposed to avoid.
quinn_sf said:If you are comparing against somebody else’s result, check that you are comparing the same measurement taken the same way.
That is correct as far as it goes, and here is where it stops going. Yes, and the corollary is less popular: if the reasoning holds, it also holds where it produces an answer we do not like.
Ask again with the specifics and you will get a better answer than this one.
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Shop Reference Standardsquinn_sf said:If you are comparing against somebody else’s result, check that you are comparing the same measurement taken the same way.
Saving this. It is the first explanation that did not require me to already understand it. Printing the relevant bit and taking it with me.
Adding the clinical framing, because it changes how the question reads. It helps to ask what evidence would change your mind before you look at any. If nothing would, the discussion is not about evidence, and it is better to say so early than to spend nine posts discovering it.
Happy to go further on any of that.