but I can tell when a basketball is underinflated immediately,
Hell the guy who caught the interception noticed it right away.
Sorry, but 2 lbs per square inch on a ball is very noticeable, football, basketball, soccer ball... there is no way you can claim that you can’t tell.. the difference between 12.5-13.5 and 10.5 is VERY noticeable, that’s a 20% psi difference... that’s noticeable by anyone, let alone someone who’s a professional and does it for a living day in and day out.
I am not saying the Pats wouldn’t have won the game either way, but to claim you couldn’t tell or didn’t notice just doesn’t pass the smell test. Anyone will notice a 20% differential in pressure almost immediately, so long as they know what it should feel like in the first place.