I finally read the professors' brief. It's pretty good. I also think it's actually conclusive -- for those who still doubted it -- whether there was actually any ball deflation going on.
The point they make pretty well is that even the league has conceded now that there would be a drop in pressure due to moving the balls outdoors. The league's position now, according to the citations in the brief, is that there is an additional incremental amount of deflation above that which would be predicted by science. We know that this is dependent on the "which gauge' problem and the league's gymnastics on the issue. And the professors do a nice job at showing that lots of environmental and timing issues could account for the supposed incremental difference.
But it all misses, to me, the most critical point. The order of magnitude of supposed extra deflation, even crediting the league's findings, is, according to the brief around .14 psi, and maybe as high as .5. This leads me to two questions: (1) Is it even possible for a guy who has 90 seconds in a bathroom to deflate balls using a release mechanism this minimally? A long time ago, in the deflategate thread, I posted about experiments that I did in my backyard cooling down and warming up footballs, with a gauage with a release. When balls are inflated to around 13 psi, they are actually pretty hard. With a hand pump, once you get above 11 or so, the pump takes considerable resistance. When the ball is inflated like that, the air comes out quickly when you release it. If you just manually stick a needle in a ball like that, it would be hard if not impossible to only let out .14 psi. It comes out way too fast. Even with a gauge that has a release button, a .14 deflation would a virtually imperceptible tap. The notion that in a minute in a bathroom at least one of the balls wouldn't take a much more significant deflation seems absurd. (2) Even if we accept everything -- that it's possible to do -- the remaining question is who the heck would do that? What player would possibly think that some advantage was gained by releasing .2 psi. It defies common sense. The argument would have to be that Brady wanted the balls deflated, but Jastremski sucks and only deflated them a tenth of a psi. It's laughable.