Martin (1992: 309):
This interaction between IDENTIFICATION and IDEATION provides a criterion for determining when relations between lexical items are cohesive. They can be treated as such where one item codes sufficient experiential meaning to be presumed by another, either directly, or indirectly through bridging.
 This was not demonstrated to be the case — even if the (previously discussed) confusion between reference and lexical cohesion in the discourse system of IDENTIFICATION is ignored. The examples used to argue the case were all clear cases of lexical cohesion: hyponymy (flowers-roses, insects-mosquitos) and meronymy (stadium-track, chimney-cottage). The system of IDENTIFICATION provided no criterion — it was irrelevant — for determining whether there was a lexically cohesive relation.
 In SFL theory, relations between lexical items are cohesive when items, as bundles of lexical features, are related by either repetition, synonymy, hyponymy, meronymy or collocation.