How should "three coplanar lines intersect" be drawn? Will they form something that looks like an asterisk? Or three lines that somehow form a triangle? Or either interpretation is acceptable?
The asterisk would be more clearly described by "three coplanar lines intersect in a point", and the triangle would be more clearly described by "three coplanar lines intersect pairwise". Without either of these clarifications, the statement is ambiguous and could be interpreted either way, depending on the context.