[argiopetech]

Also not true. They have a duty to enforce the law as they understand it (noting that verification is just a phone call away), which may be better than average due to training and experience, or not.

Either way, your duty is to cooperate with law enforcement. If they are wrong, the only proper place to determine that is the courts. If they are right, you'll still have avoided a "resisting" charge

[dymk]

The police do not have a duty to enforce the law, as determined multiple times by the supreme court and other federal courts.