Hacker News Reader

Then that should be the law ("you can speed in such-and-such circumstances, potentially argued before a jury").

Agreed, but my point still remains, even that law would not be perfect.

You would always miss out something or leave something open for abusers, so, to some extent, common sense should prevail too.

Hence judicial discretion and jury nullification. But the idea of jury trials for traffic violations is economically laughable.