  Aiming at self-consistent descriptions of multiquark hadrons (such as
tetraquarks, pentaquarks, hexaquarks) by means of QCD sum rules, we note that
the totality of contributions to two-point or three-point correlation functions
that involve, respectively, either two or just a single operator capable of
interpolating the particular multiquark under study can be straightforwardly
disentangled into two disjoint classes defined by unambiguously identifiable
members. The first is formed by so-called multiquark-phile contributions which
indeed might support multiquarks. In the case of flavour-exotic tetraquarks, by
definition composed of four (anti-) quarks of mutually different flavours, a
tetraquark-phile contribution has to exhibit two or more gluon exchanges of
appropriate topology. The second consists of contributions evidently not
bearing any relation to multiquarks; these must be discarded when studying
multiquarks by QCD sum rules. The first class only should enter the
"multiquark-adequate" QCD sum rules for exotic hadrons.
