Martin (1992: 528):
As with register systems in general, tenor systems put certain types of meaning at risk and for the most part it is a pattern of interpersonal choices across a text which is meaningful, not the individual choices themselves. Indeed, the notion of reciprocity implies that a number of choices have to be examined from the perspective of different participants for tenor to be realised at all.
 This confuses functional varieties of language (registers/text types) with the culture as a semiotic system that is realised in language (and other semiotic systems). The confusion is thus along two semiotic dimensions simultaneously: stratification (context vs language) and instantiation (system vs instance type).
 The "risks" that meaning is exposed to are never actually specified. To be clear, risk is the potential of gaining or losing something of value.
 All interpersonal choices are meaningful, whether as meanings realised in wordings, or as wordings realising meanings. Each selection is an instantiation of the system during logogenesis; patterns of selections are termed logogenetic patterns (Halliday & Matthiessen 2004: 524-31; Halliday & Matthiessen 2014: 593-603).
 The realisation of tenor in language does not depend on what linguists examine, let alone on the perspectives taken.