  Investigations of some type Iax supernovae have led to the suggestion that
their ejecta must be layered to some degree. Such an ejecta structure has been
argued as inconsistent with the well-mixed composition predicted by pure
deflagrations. Based on explosion models, we create toy models in which the
ejecta are artificially stratified and progressively mixed until a uniform
composition is obtained. We find that models that are heavily mixed, containing
burned and unburned material at all velocities, produce reasonably good
agreement with SN 2012Z, for which a layered structure has been suggested. We
also discuss how existing ejecta compositions determined for type Iax
supernovae do not necessarily contradict pure deflagration models and may be
consistent with a steeper density profile. We investigate previous claims that
differences in line profile shapes may be due to strong blending, by presenting
a series of models with different plasma states. These models indicate that
blending could indeed explain differences in the observed profiles.
Alternatively, stratification could also explain such differences, however all
of our models indicate that this does not necessarily require stratification in
abundance. Sufficient stratification in ionisation state can be achieved even
for a well-mixed model. Based on our analysis, we demonstrate that there is
insufficient evidence to suggest the ejecta of type Iax supernovae must be
layered and therefore argue the pure deflagration scenario is not ruled out,
even for the brightest type Iax supernovae. Our analysis does not indicate the
ejecta cannot be layered to some degree, but observations within days of
explosion are necessary to determine the extent to which the outer ejecta could
be layered.
