From my calculations, assuming mol of air is constant and volume is essentially constant, a ball inflated to 12 PSI at 72°F, or 22°C, would deflate to 11.1 PSI at 32°F, or 0°C.
Deflategate is a 2 PSI difference? If so, the balls would have had to be inflated at significantly higher than room temperature for the Ideal Gas Law to explain it (provided I've made no calculation mistake).
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