[AndrewC]

If there's liquid water under the ice, there is a very good chance of either prebiotic soup or life itself.

And you base that on what?

[Virginia-American]

The presence of liquid water and a source of energy (heat and electromagnetic), plus carbon, nitrogen, minerals, etc. It may in fact be too cold and have too little energy for much to have happened (compared to earth). But, assuming there's liquid water, either there's life, or there's several million years worth of Urey-Miller type reactions. If there is no life, I'm not sure it's fair to call it prebiotic.