Sorry, I should also add that instantiation completely changes the game, as it brings together criteria from different strata
Perhaps the relation between move and speech function can be considered as instantial. That is a move in an exchange may be instantiated by various speech functions, depending on (/realising) contextual factors
Blogger Comments:
[1] Instantiation is the relation between language as potential and language as actual instance (text). It is a relation that obtains on each stratum — it is not a relation between strata. For example,
- on the semantic stratum, instantiation is the relation between the system of semantic potential and the actual semantic selections in a specific text;
- on the lexicogrammatical stratum, instantiation is the relation between the system of lexicogrammatical potential and the actual lexicogrammatical selections in a specific text;
- on the phonological stratum, instantiation is the relation between the system of phonological potential and the actual phonological selections in a specific text.
As such, instantiation does not "bring together criteria from different strata".
[2] As such, the relation between move and speech function cannot be considered as instantial. Where SPEECH FUNCTION is a semantic system, move is a unit on a semantic rank scale — just as MOOD is a lexicogrammatical system and clause is a unit on the lexicogrammatical rank scale.
[3] The incoherence of Rose's final sentence can be made clear by paraphrasing the same speculation for lexicogrammar:
- a verbal group in a clause may be instantiated by various moods, depending on (/realising) semantic factors.
[A verbal group realises the Finite and Predicator as interpersonal functional elements at clause rank (i.e. realisation down the rank scale); and clause rank interpersonal structure realises the clause rank interpersonal system of MOOD (i.e. realisation across axes).]
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