Hence the importance of keeping major legal issues as simple as the Founding Fathers instantiated them in the Constitution and Bill Of Rights: the common man is presumably incapable[1] of keeping up with voluminous manifestations of nuances of legislative and case law. If the police aren't expected to keep up with it all, in no way should prospective detainees (i.e.: all of us) be as well.

But, alas, the legal system being what it is, that's why those of us smart enough to try to keep up with such matters must do so: protect, at least, our own skins.

[1] - Not in an insulting way; there's a reason we pay lawyers big bucks to know such things.