What differs between the MESSAGE features in Figure 24.4 below and the mood features that realise them is their systemic valeur. The valeur of MOOD features is shaped by similarities and contrasts in the mood structures that realise them, exemplified in Table 24.4.The valeur of message features is shaped by three factors as far as I can see. System G features by their position in exchange structures: verify/enquire etc. System F features by appraisal: precise/tentative; by field: specify/explain; again by exchange structure: prompted/unprompted; and again by field: global/particular...In sum, the MESSAGE system attempts to synthesise the complementarity of two discourse semantic systems, NEGOTIATION and APPRAISAL. …
Blogger Comments:
[1] To be clear, the critical distinction between the semantic features of the SPEECH FUNCTION system and the lexicogrammatical features of the MOOD system is that each system of features is located at a different level of symbolic abstraction.
[2] This is misleading. To be clear, the valeur of each MOOD system feature is its relations to other features in the system; see, for example, Halliday & Matthiessen (1999: 96, 509). This misrepresentation of 'valeur' serves as a pretext for the misrepresentations that follow.
[3] To be clear, the valeur of each of Hasan's SPEECH FUNCTION system features is its relations to the other features in the system, and as such, they are not "shaped by" other systems such as APPRAISAL or FIELD, the latter being Martin's misunderstanding of ideational semantics as register misunderstood as context.
[4] This is very misleading indeed, because it misrepresents Hasan's (earlier) system as an attempt to synthesise Martin's (later) systems, one of which, NEGOTIATION, is Martin's rebranding of SPEECH FUNCTION.
