so here's the problem:
page 113 of the wells report:
According to Exponent, based on the most likely pressure and temperature values for the Patriots game balls on the day of the AFC Championship Game (i.e., a starting pressure of 12.5 psi, a starting temperature of between 67 and 71 degrees and a final temperature of 48 degrees),the Ideal Gas Law predicts that the Patriots balls should have measured between 11.52 and 11.32 psi at the end of the first half, just before they were brought back into the Officials Locker Room.
or, a pressure differential of 0.98 to 1.18.
The balls were measured at half time with two gauges - referred to as a "Logo" gauge and a "NonLogo" gauge. on page 116:
In addition, Exponent determined that when the Logo and Non-Logo Gauges measure an identical pressure, different readings are produced. According to Exponent, the Logo Gauge produced readings that were generally in the range of 0.3-0.4 psi higher than the NonLogo Gauge. However, for a given set of measurements, the differential between the gauges generally remained consistent when compared to a calibrated gauge. In other words, in the short term, both the Logo Gauge and Non-Logo Gauge read consistently, though differently from each other. Exponent‟s experimental results were aligned with the measurements recorded at halftime, which indicated a consistent gauge-to-gauge differential of 0.3-0.45 psi.
so lets look at the raw data (page 8):
ball blakeman piroleau diffpat1 11.5 11.8 -0.3pat2 10.85 11.2 -0.35pat3 11.15 11.5 -0.35pat4 10.7 11 -0.3pat5 11.1 11.45 -0.35pat6 11.6 11.95 -0.35pat7 11.85 12.3 -0.45pat8 11.1 11.55 -0.45pat9 10.95 11.35 -0.4pat10 10.5 10.9 -0.4pat11 10.9 11.35 -0.45 colt1 12.7 12.35 0.35colt2 12.75 12.3 0.45colt3 12.5 12.95 -0.45colt4 12.55 12.15 0.4you can see that gauge difference reflected in these measurements, and see that Prioleau must have used the Logo gauge. Note that it appears blakeman and Prioleau mixed up the gauges while measuring the Colts balls, as noted in the report: (pg 116)
Clete Blakeman most likely used the Non-Logo Gauge and Dyrol Prioleau most likely used the Logo Gauge to test the Patriots game balls at halftime, and that the game officials most likely switched gauges before measuring the Colts balls at halftime.
Here's my beef: which gauge was used for the pre-game inspection?
The Wells report concludes that "
Anderson most likely used the NonLogo gauge to inspect the game balls prior to the game." I'm not clear on how that assumption can be made. Here's why it matters:
Assume the logo gauge was used pre-game to set the Pats balls to 12.5. if you were to check those same balls with the non-logo gauge, you could see measurements as low as 12.05 PSI, before you even take them outside. If you then apply the 1.18 PSI pressure drop, you would expect these perfectly legal, cold balls to have a pressure of no less than 10.87 when measured non-logo gauge.
looking at the data above, three out of the 11 measured balls fell below that threshhold, and two of those were really, really close to the edge. When you get down to it, there is only one ball out of spec here.
I'm curious to know why they assume Anderson used the non-logo gauge.