Theoretical Inconsistencies Created By The Three Systems Of Ideation

Martin & Rose (2007: 76):

These three systems of ideation are summarised in Figure 3.2.

Blogger Comments:

To be clear, these three systems of ideation are presented as systems of the experiential metafunction on the stratum of discourse semantics. Close inspection reveals otherwise.

The system of taxonomic relations is a rebranding of Halliday & Hasan's (1976) lexical cohesion, a system of the textual metafunction at the level of lexicogrammar. The theoretical inconsistencies created are thus metafunctional and stratal.

The system of nuclear relations is a rebranding of Halliday's (1985) nuclear interpretation of the ergative model of the clause. The theoretical inconsistency created is thus stratal. Note that the meanings realised are all within the clause, not "beyond the clause" (the subtitle of this work).

The system of activity sequences is concerned with logical relations between clauses. The theoretical inconsistencies created are thus metafunctional and stratal. 

Moreover, this is also inconsistent with Martin (1992), in which activity sequences are located in context — misconstrued as register — and inconsistent with both that work and this, where logical (and textual) relations between clauses are modelled by the logical discourse semantic system of conjunction — itself a rebranding of Halliday & Hasan's (1976) textual grammatical system of cohesive conjunction.