They are not mutually exclusive options.
Only these two mutually exclusive options would square the interaction principle with causal closure (Antony (2003, 5), arguing in a similar vein, fails to notice the second option).
It is a sys-net requirement that for further exploration at any one specific point, one and only one option can be chosen from amongst the existing mutually exclusive options.
Two related comments will complete this account: first, each simple system has two or more mutually exclusive options, each representing information specific to it but at the same time related to that of the other options in the same system.
The questionnaire included 33 questions of the following types: i) open-ended questions; ii) multiple choice questions in two variations: those requiring mutually exclusive options and single response and those permitting multiple selected answers and iii) Likert-type scale questions.
The m-system of mode called role of language opens as an individual system (treated here as primary) with three mutually exclusive options: (i) 'constitutive'; or (ii) 'supported'; or (iii) 'ancillary' (p 38 m.
This situation introduces the concept of 'choice' in the process of the sys-net's 'derivation'; and as just described the exploration of the chosen options 'reappears' as the options of the next simple system displaying, in its turn, a number of mutually exclusive options, ready to be chosen to continue further the cycle of the system's derivation.
This means that, unless otherwise indicated, the options of each of these m-systems are combinable within the limits placed by mutually exclusive options; the computed SEs in this description will be so enormous that their calculation or representation is beyond my means.
The application model is designed around a relational database management system with the user interface generated in Visual Basic and a rule base implemented through a hierarchy of mutually exclusive options presented to the user based on choices made as the user progresses through the various decision levels.
These two choice paths, C or P, cannot be combined at any point in this sys-net: their choice paths began with the mutually exclusive options 'graphic' (a1 in pp) or 'phonic' (a2 in pp) belonging to the same primary system of pp (compare the analogous choice paths 3 and 4 in Tables 3 and 4 above).
