After a hard-fought battle, Illinois residents next month can begin applying for permits to carry concealed guns in public. But those who do could face another challenge: figuring out where it's legal to carry a firearm and where having a gun could land them in jail. While the Illinois statute lays out nearly two dozen places where guns are prohibited — including schools, public parks, government offices and hospitals — it also includes caveats that might seem confusing, even contradictory, particularly to novice gun carriers. For example, the law prohibits guns at events where there is a large gathering of...