We compute the theory of
H
2
(
G
,
Q
/
Z
)
H^{2}(G,\mathbb {Q}/\mathbb {Z})
for any proabelian group
G
G
, using a natural isomorphism with the group
Alt
(
G
,
Q
/
Z
)
\operatorname {Alt}(G,\mathbb {Q}/\mathbb {Z})
of continuous alternating forms. We use this to establish a sort of generic behavioral ideal, or role model, for the Brauer group
Br
(
F
)
\text {Br}(F)
of a geometric field
F
F
of characteristic zero. We show this ideal is attained in several interesting cases.