It's probably a reference to Neural Prolog.
Neural Prolog-the concepts, construction and mechanism
http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=538347
This article introduces a Prolog-like
inference system based on Neural
Logic. A brief introduction of the
background of this research is given
first. The logical basis, knowledge
construction and inference mechanism
of Neural Prolog are described
An integration of Prolog and neural networks to deal with sensibility in logic programs
http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=138740
Neuro-Prolog, which integrates the
Prolog interpreter C-Prolog and the
neural network simulator SunNet, is
described. By using Neuro-Prolog,
users can handle both definite
information, such as logical rules,
and indefinite information, such as
sensibility, concurrently in a single
system. In Neuro-Prolog, the definite
information is handled in Prolog and
the indefinite information is handled
in neural networks.