The list chromatic number ${\chi }_L(G)$ is defined to be the minimal $k$ such that for any assignment of a list of $k$ colours to each vertex of $G$ (perhaps different lists for different vertices) a colouring of each vertex by a colour on its list can be chosen such that adjacent vertices receive distinct colours.Does there exist some constant $c>0$ such that$${\chi }_L(G)+{\chi }_L(G^c)>n^{1/2+c}$$for every graph $G$ on $n$ vertices (where $G^c$ is the complement of $G$)?