Dr.BariatricHTX said:

Start from the measurement rather than the conclusion.

This is my experience too, for whatever a second data point is worth. I had assumed I was the exception until I read this.

Dr.BariatricHTX said:

Start from the measurement rather than the conclusion.

Adding the part of the answer the thread has not reached. The version of this that has an answer is narrower than the version being asked. Narrow it and it becomes tractable; leave it broad and the thread will produce nine confident and incompatible replies.

If somebody has the primary source to hand I would rather cite it than paraphrase it.

Moderator note: two posts asking for a source have been merged into one. Please search the thread before asking again. Carry on.

One thing that is still open after Dr.BariatricHTX’s answer:

What did you change at the same time, and can you separate the two now?

tony_orlando said:

The version of this that has an answer is narrower than the version being asked.

This is where I part company with the consensus forming above. 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.