MaxMetOK said:

What actually changed my mind was the point about waiting for a trend instead of reading a single measurement, which is embarrassing in hindsight and…

I read this differently from MaxMetOK, 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.

MaxMetOK said:

What actually changed my mind was the point about waiting for a trend instead of reading a single measurement, which is embarrassing in hindsight and…

Agreed, and one caution: a single measurement is not a measurement. Anything that moves day to day needs a trend before it means anything at all.

MaxMetOK said:

What actually changed my mind was the point about waiting for a trend instead of reading a single measurement, which is embarrassing in hindsight and…

That reframing is the part I needed. Sending this to two other people who asked me the same thing last week.

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.

hans_munich said:

It helps to ask what evidence would change your mind before you look at any.

Can confirm. Same sequence, different timescale. The detail I would add is minor and it is already implied above.