So who is the smarty pants?

[CXtreme]

Convention on the 777 is to request RTOW for J9 on Rwy 25L. It is never a problem for departure.
It is also good airmanship to request “full length” on contact with Tower. I fully see your point Bedder b. but there is also a “diplomatic game” or some CRM going on in the cockpit, especially on a check where the person under check try to show an awareness of the advantage or benefit of J10.
I have been in the position where as Pilot Flying, I ask the captain to request J10. I found the best way to resolve this is during briefing the departure to mention “ We would request J10 for departure, but as the RTOW is legal for J9 we can except it to avoid delays”.
From where I sit this sound like training / checking environment where the crew need that extra confirmation / input.
I have respect and understanding for both side and agree with a previous post that jump seat ( fan flight’s as we use to call them ) would help a lot to promote understanding.

St. Patrick’s day