  We reconsider the predictions of inflation for the spectral index of scalar
(energy density) fluctuations (n_s) and the tensor/scalar ratio (r) using a
discrete, model-independent measure of the degree of fine-tuning required to
obtain a given combination of (n_s, r). We find that, except for cases with
numerous unnecessary degrees of fine-tuning, n_s is less than 0.98, measurably
different from exact Harrison-Zel'dovich. Furthermore, if n_s \gtrsim 0.95, in
accord with current measurements, the tensor/scalar ratio satisfies r \gtrsim
10^{-2}, a range that should be detectable in proposed cosmic microwave
background polarization experiments and direct gravitational wave searches.
