{And even as they refused} (kai kath(9373) ouk edokimasan).
"And even as they rejected" after trial just as dokimaz(935c) is
used of testing coins. They tested God at first and turned aside
from him. {Knowledge} (epign(9373)ei). Full knowledge (epi
additional, gn(9373)is). They had a dim memory that was a
caricature. {Unto a reprobate mind} (eis adokimon noun). Play
on ouk edokimasan. They rejected God and God rejected their
mental attitude and gave them over (verses  24,26,28 ). See this
adjective already in  1Co 9:27  2Co 13:5-7 . Like an old
abandoned building, the home of bats and snakes, left "to do
those things which are not fitting" (poiein ta m(8820)kath(886b)onta),
like the night clubs of modern cities, the dives and dens of the
underworld, without God and in the darkness of unrestrained
animal impulses. This was a technical term with Stoics (II Macc.
6:4).