Dr.AddMedPHL said:

It is worth asking what the claim would look like if it were false.

Adding a me-too, because a thread of one person's experience is not much use. I had assumed I was the exception until I read this.

Dr.AddMedPHL said:

It is worth asking what the claim would look like if it were false.

Coming at Dr.AddMedPHL’s question from a different direction. Start from the measurement rather than the conclusion. Almost every disagreement here turns out to be two people measuring different things and comparing the numbers anyway.

Moderator note: good thread. Keeping it here rather than moving it, because the question is general enough to be useful. Carry on.

A narrower follow-up, since the general answer is now clear:

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

ben_calgary said:

Start from the measurement rather than the conclusion.

Filing a mild objection. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit. Filing an objection on the n=1 problem. Personal experience is genuine evidence about one person and very weak evidence about anybody else, and this thread keeps promoting the first into the second.