See, I took these two sentences to be related. I didn't realize you said 1. They are not supernotes if you or a bank could tell they are fake. 2. Supernotes have higher quality image than real bills. I thought you said They are not supernotes if you or a bank could tell they are fake, [because] supernotes are higher quality than real bills (after all if they have sharper images than real bills then a bank can tell they are fake by blowing them up right?)