Effective phantom dark energy in scalar-tensor gravity
  We revisit the problem of phantom behaviour of effective dark energy in
scalar-tensor gravity. The main focus is on the properties of the functions
defining the model. We find that models with the present phantom behavior can
be made consistent with all constraints, but one of these functions must have
rather contrived shape, and the initial data must be strongly fine-tuned. Also,
the phantom stage must have begun fairly recently, at $z\lesssim 1$. All this
disfavors the effective phantom behaviour in the scalar-tensor gravity.
