The intercepted ball measured 11.5 per the Colts gauge which matches up to what it should have been.
It actually was measured 3 times, by the same person using the same gauge, giving values of 11.35, 11.45, and 11.75 psi. This does indeed average to 11.5 (and 11.32 is predicted), but it also shows that there is a tremendous amount of ERROR in using those gauges.
So, as this article says, the alleged 0.3 psi difference
vanishes like a fart in the wind if the gauge that the ref remembers using was indeed used,
But...and this is the kicker...the alleged 0.3 psi difference
ALSO vanishes like a fart in the wind even if Walt Anderson actually used the gauge that he thinks he didn't use, because 0.3 psi is way less than the error bar for using one of these gauges one time for measuring each football, as evidenced by the 0.4 psi range of values obtained for testing the intercepted football.
So definitively nothing happened to the footballs if the ref's memory is right, and there is also no reason to suspect foul play even if the ref's memory is WRONG.
It's airtight and ironclad. There is no scientific doubt.