Data are presented for three glass formers, each having an excess wing in the low temperature dielectric loss spectra. Two
polychlorinated biphenyls, whose α relaxations have equivalent temperature dependences, exhibit excess wings that are clearly
different. Comparison of the spectra for glycerol at atmospheric pressure and at P=0.9 GPa reveals a different response of the α relaxation and the excess wing. These findings cannot be reconciled with the
notion that the excess wing is an inherent part of the α relaxation. Interpretation of the spectra as a superposition of distinct
α and β processes, however, is consistent with the observed behavior.