  Comin et al. [Science 347, 1335 (2015)] have interpreted their resonant X-ray
scattering experiment as indicating that charge inhomogeneities in the family
of high-temperature superconductors YBa2Cu3O6+y (YBCO) have the character of
one-dimensional stripes rather than two-dimensional checkerboards. The present
comment shows that one cannot distinguish between stripes and checkerboards on
the basis of the above experiment.
