.THE APPLICATION of Bayesian contradiction to a variety of lithologic specifications in an evaluation of seismic information hardly seems to be right stuff of titles. Yet when the seismic data you are assessing arised from Mars, as well as when your reasoning suggests that the best explanation for them is liquefied water in the pores in between rocks, you possess an account. There is dwarfs crave even more, when it comes to worldly science, than water on Mars. Why carries out the possibility prompt such exhilaration-- and also what performs this new research add to the account?