  Hess and Philipp have constructed what, they claim, is a local hidden
variables model reproducing the empirical predictions of quantum mechanics. In
this paper explicit expressions for the conditional probabilities for the
outcomes of the measurements at the two detectors are calculated. These
expressions provide a conclusive demonstration of the falsity of the authors'
claim. The authors give two different accounts of their model. The published
version omits a crucial detail. As a result it disagrees with quantum
mechanics. It also violates signal locality. The unpublished version agrees
with quantum mechanics. However, it violates the condition of parameter
independence, as Myrvold has previously shown.
