Thanks! and, the link worked :)
It's unknown whether water actually exists on the planet, and what kind of atmosphere it has. But because conditions are ideal for liquid water, and because there always seems to be life on Earth where there is water, Vogt believes "that chances for life on this planet are 100 percent."
It is an odd statement, but I think he's saying the conditions for life, are as good as we'll see,...not that it's 100 percent certain there is life on that planet.
But I could be wrong. Thanks for the link. :)