You often can't tell from a CV why the person moved on. Did the company they worked for go down? Did some employer offer them a deal they couldn't refuse? You c

You often can't tell from a CV why the person moved on. Did the company they worked for go down? Did some employer offer them a deal they couldn't refuse? You can't assume they just decided to stay looking for the next thing of their of accord. These kinds of things happen all the time to people, so just looking at the lengths didn't tell you much.