I think by "counter factual" Brumby meantTurkey was a level 3 f35 partner since long.
They also knew s400 was squarely designed to be effective against LO targets. Also, even before any s400 deal, US without specific direction indicated that any partner that buys s400 would be excluded from f35 program.
Yet turkey decided to buy a couple regiments anyways. I was just curious, if they knew they were going to be excluded from the program over s400 and were in bed with russians to reveal some tech regarding f35, they could've just waited 24 months to order s400. Its not like the russians wouldn't want to supply them the system just because they had f35 operational.
Anyways, i'm not going to push this any further because i don't know where i went counter factual.
anyway about one year (?) ago the speculation was Turkey had used the S-400 negotiations as an attempt to trim the price of the Patriots (I might even post this speculation, but it's a moot point now LOL so I won't start looking for a link; somebody either made it up or was wrong)