  The non-Gaussian cold spot found in the WMAP data has created controversy
about its origin. Here we calculate the Bayesian posterior probability ratios
for three different models that could explain the cold spot. A recent work
claimed that the Spot could be caused by a cosmic texture, while other papers
suggest that it could be due to the gravitational effect produced by an
anomalously large void. Also the Sunyaev-Zeldovich effect caused by a cluster
is taken into account as a possible origin. We perform a template fitting on a
20 degrees radius patch centered at Galactic coordinates (b = -57circ, l = 209)
and calculate the posterior probability ratios for the void and
Sunyaev-Zeldovich models, comparing the results to those obtained with
textures. Taking realistic priors for the parameters, the texture
interpretation is favored, while the void and Sunyaev-Zeldovich hypotheses are
discarded. The temperature decrement produced by voids or clusters is
negligible considering realistic values for the parameters.
