  We reemphasize the importance of discriminating fermion-loop and bosonic
electroweak corrections in the analysis of electroweak precision data. Most
recent data are indeed precise enough to require corrections beyond (trivial)
fermion loops. An analysis of these data in terms of the observables $\Delta x
\equiv \epsilon_{N1} - \epsilon_{N2}$, $\Delta y \equiv - \epsilon_{N2}$ and
$\epsilon \equiv - \epsilon_{N3}$ identifies the required additional
corrections as vertex corrections at the $W^\pm f\bar f^\prime$ and $Z^0 f\bar
f$ vertices. Standard-model values for these corrections are consistent with
the experimental data.
