  We investigate a higher-derivative scalar field model in a fixed d+1
dimensional AdS background as a toy model for a gravitational dual to a
higher-rank logarithmic CFT. The holographic two-point correlation functions on
the boundary agree with higher-rank LCFT correlation functions. For odd rank,
the theory allows for a truncation to a nontrivial subspace with non-negative
scalar product. We discuss possible implications for higher-derivative critical
gravity theories.
