  The use of leading order effective field theory (EFT) to describe
neutron-deuteron scattering leads to integral equations that have unusual
behaviour: when only two-body interactions are included, the scattering
amplitude does not approach a limit when the cutoff used to solve the equations
is removed. It has recently been shown that this cutoff dependence can be
eliminated by the careful inclusion of a three-body force. In this paper we
show that the cutoff dependence is just a reflection of the fact that the
aforementioned integral equations admit an infinite number of solutions amongst
which only one corresponds to the physical scattering amplitude. We show how to
numerically extract the physical scattering amplitude from the general solution
and in this way explicitly demonstrate that the amplitude for a particle
scattering off a two-body bound state, in leading order EFT, is in fact
determined entirely by two-body forces.
