Much was discussed on that ghost ship. Details about the phenomenon, the bodies found, the survivors, and the fog. Although, neither Claire nor Cecilia thought anything too useful came out of that conversation. Sure, some pretty insightful observations had been made about the whole thing, but it was nothing that the girls weren't already suspicious of their analysis.
With the above said, it is not that both of them got absolutely nothing from that conversation. Curiously, from what had been said regarding what martial artists called illusory formations and their resemblance to what the fog was capable of doing to the mind, a couple of things could be deduced.