{Unless indeed ye be reprobate} (ei m(8874)i adokimoi este).
Paul challenged his opposers in Corinth to try (peirazete)
themselves, to test (dokimazete) themselves, whether they were
"in the faith" (en t(8869) pistei), a much more vital matter for
them than trying to prove Paul a heretic. Such tests can be made,
unless, alas, they are "reprobate" (adokimoi, the very
adjective that Paul held up before himself as a dreadful outcome
to be avoided,  1Co 9:27 ).