  We study 't Hooft anomalies for a global discrete internal symmetry G. We
construct examples of bosonic field theories in three dimensions with a
non-vanishing 't Hooft anomaly for a discrete global symmetry. We also
construct field theories in three dimensions with a global discrete internal
symmetry G_1 x G_2 such that gauging G_1 necessarily breaks G_2 and vice versa.
This is analogous to the Adler-Bell-Jackiw axial anomaly in four dimensions and
parity anomaly in three dimensions.
