Try again
The footballs in question had just spent over two hours at game temperatures and atmospheric pressures. Halftime is brief. Therefore, the “cold” footballs and the air within them would have little time to acclimate to the indoor temperatures. The time for testing and adding a couple of psi to the footballs during halftime would have a small effect as they were returned to the field of play immediately for the second half.
If this were really an issue of science, the footballs and apparatus for testing and inflating would be at field temperatures and atmospheric pressures.
Just sayin’...
You missed the point. Once reinflated at halftime, the footballs did not drop again in psi during the second half. They were put back in the same conditions and did not experience the natural drop Dr. Belichick claims they did during the first half. Clear as day. The balls were uniformly and intentionally deflated by one team and during one half before they got busted.