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=over

=cut

=item B<verify()>

    $rc = $self->query_rc( @args );
    $rc = $self->verify( $rc, $state, $tag, $subject, $test );

Here comes rationale.
Writing (or should I say "composing"?) correct {fst} B<A::F> style is hard
(I know what I'm talking about, I've made a dozen already).
The purpose of B<verify()> is to check if the I<{fst}> at hands isn't fubar.
Nothing more, nothing less.
B<query_rc()> is a placeholder for one of B<query_.*()> methods,
I<$test> will be matched against C<ref $rc>.
Other arguments are to fill diagnostic output (if any).
I<$state> hints from what I<{state}> I<$rc> has been queried.
I<$subject> and I<$tag> are short descriptive name and actual value of I<$rc>.
Yup, dealing with B<verify()> might be fubar too.