As someone, like many, who has sifted through thousands of CVs and gone on to interview many it is very hard to believe that much of the data will accurately reflect reality.

Looking at social media and seeing that someone's CV doesn't match something akin to their LinkedIn profile might be helpful, seeing photos online of debauchery at a business conference might call into question their sense of propriety but seeing someone drinking cocktails (even too many) at a private BBQ is irrelevant. I have been told that playing field hockey risks various injuries and squash risks heart attacks and knee injuries but I counter that with sitting on a sofa all evening long brings its own risks. Other metrics would also need to be balanced.

Basically, I am I a qualified actuarial? No. So I shouldn't be assuming that I know how to process such data when there is already a field for that expertise. On the other hand I can find out information and apply common sense.