From the other side of the consultation, briefly. The useful move here is to separate what is established from what is widely repeated. Those two sets overlap less than the confident tone of most write-ups suggests, and the second set is where nearly all the disagreement on this board comes from.

Dr.PathRoch said:

The useful move here is to separate what is established from what is widely repeated.

Same pattern here, and in the same order. The detail I would add is minor and it is already implied above.

Dr.PathRoch said:

The useful move here is to separate what is established from what is widely repeated.

Coming at Dr.PathRoch’s question from a different direction. The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either. Those three things can all be true at once, and most arguments here are two people holding different parts of that.

One concrete data point for the thread. One practical note: write down what you did and when, before you need it. Reconstructing a timeline from memory three months later is how people end up unable to answer the one question that would have resolved it.

Moderator note: leaving this open. It is being argued well and the disagreement is the useful part. No action needed from anybody.