Yes but it is all interesting stuff, you have been only listening to it perhaps for a few years but I have heard this argument for around 30 years and for me it underlines human factors possibly more than any other argument amongst pilots.
Notice how many experienced pilots above are convinced they are right because they are experienced, this is the sort of stuff accidents are made of!
the only time P1s is able to be logged is on the successful completion of a flight test.....
Now my take on it is and I am not convinced I am right I just know how I approach the problem, is that the above quote is most certainly wrong.
You can log anything you like in your log book I have seen passenger flying in Concorde logged in a log book. A log book is yours, it dosnt belong to the CAA its yours and what you put in it is your business.
And Bose you may have read the rules but with respect you did not understand them because there is no mention in the ANO of P1s.