Well, let's see if I can put you to sleep in 30 seconds:
Everything in physics is some type of approximation, nothing is ever 100% exactly exact (Heisenberg Uncertainty Principle), so the question is: "does the Ideal Gas Law provide an accurate prediction / close approximation for the behavior of actual gases in this case (involving football deflation)?
The ideal gas law comes from the kinetic theory of gases. Assuming that a large amount of molecules are involved and the container volume is large compared to the molecular volume (definitely true for a football), the primary assumption for the "Ideal Gas" is that no forces act between the molecules except during elastic collisions of negligible duration, which is not, in fact, exactly true for any actual gas.
Nevertheless, the behavior of actual gases is described quite closely by the Ideal Gas Law as long as we aren't talking about ultra low temperatures (on the Kelvin scale), super high pressures, or a gas near its condensation point (all of those assumptions are valid for this case), so that the large distances between molecules and their high speeds overcome any interaction force between the molecules.
Upshot: The Ideal Gas Law provides a very close, excellent approximation of the behavior of actual gases in a football as the temperature of the football (and the enclosed gas) is reduced.
I haven't seen any real scientist dispute this. Palm Beach Pats Fan (a Ph.D. Chemist) wrote an excellent discussion of this in the "DeflateGate Forum", and I (a physics prof) completely agree with his analysis.
Fast asleep, right? Works better than sleeping pills.