  We consider the issue of what should count as a resource for
measurement-based quantum computation (MBQC). While a state that supports
universal quantum computation clearly should be considered a resource,
universality should not be necessary given the existence of interesting, but
less computationally-powerful, classes of MBQCs. Here, we propose minimal
criteria for a state to be considered a resource state for MBQC. Using these
criteria, we explain why discord-free states cannot be resources for MBQC,
contrary to recent claims [Hoban et al., arXiv:1304.2667v1]. Independently of
our criteria, we also show that the arguments of Hoban et al., if correct,
would imply that Shor's algorithm (for example) can be implemented by measuring
discord-free states.
