Why does everyone (including those doing "experiments") assume that the footballs were tested outside at halftime? My understanding was that they were tested inside, which btw would change the results and make tampering a much more likely scenario.

You do realize that the experiments you cite rely on the officials testing the balls at halftime outside in the cold, and not indoors in the same environment that the pre-game tests were done? My understanding from what I read was that they were re-tested at halftime indoors. Taking them indoors would make the…