You get a flu shot every year to minimize your chance of getting the flu. You don't smoke (hopefully) to minimize your chance of getting heart and respiratory disease. You wear a seat belt to minimize your chance of getting killed in an auto accident. Nothing completely eliminates bad outcomes; you can, however, reduce the probability of them happening. Grading cards substantially reduces the chance of getting doctored cards; it does not eliminate it. Procedures will improve over time to reduce the probability of getting a doctored card still further. However, like in the prior examples, the probability will never go to zero. If you can live with that great. If not, you will never be happy.
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