  In this reply, we include new experimental results and verify that the
observed non-linearity in rippled-MoS$_2$ (leading to mobility kink) is an
intrinsic property of a disordered system, rather than contact effects
(invasive probes) or other device issues. Noting that Peng Wu's hypothesis is
based on a highly ordered ideal system, transfer curves are expected to be
linear, and the carrier density is assumed be constant. Wu's model is therefore
oversimplified for disordered systems and neglects carrier-density dependent
scattering physics. Thus, it is fundamentally incompatible with our
rippled-MoS$_2$, and leads to the wrong conclusion.
