Halliday & Matthiessen (1999: 599, 600):
At the same time the ‘scientific’ models of the mind fail to extend consciousness in the way it is extended by the grammar of English. There are, in fact, two complementary perspectives embodied in the semantic and grammatical systems of English; and together they point towards an alternative interpretation both of ‘information’ as constructed in cognitive science and of the individualised ‘mind’ that is its object of study. … [These are] the construal of processes other than the mental (saying and symbolising), and that of meaning as enacting as well as meaning as construing.