  The following comment is based on an article by M. Jafarpour and L. Assadi
[Eur. Phys. J. D 70, 62 (2016), doi:10.1140/epjd/e2016-60555-5] which with an
exploitation of Scott measure (or generalized Meyer-Wallach measure) the
entanglement quantity of four-qubit graph states has been calculated. We are to
reveal that the Scott measure (Q_m) nominates limits for m which would prevent
us from calculating Q_3 in four-qubit system. Incidentally in a counterexample
we will confirm as it was recently concluded in the mentioned article, the Q_2
quantity is not necessarily always greater than Q_3.
