Sure - looks like a 5 point scale
    
Trust weight (t)  Semantic         Human-meaningful label
    ----------------------------------------------------------
    t == 0            no trust         New person
    0 < t < 0.25      low trust        Acquaintance
    0.25 >= t < 0.75  medium trust     Friend
    0.75 >= t < 1.0   high trust       Peer
    t == 1            complete trust   Partner