When you graph a system of two linear equations, which outcome is NOT possible?

When you graph a system of two linear equations, which outcome is NOT possible?
The lines do not intersect, so there are no solutions.
The lines intersect at one point, so the system has one solution.
The lines intersect in two different points, so the system has two solutions.
The graphs of the two equations are the same line, so there are infinitely many solutions.