The following sentence is from Bertrand Russell. I would like to know if in the emboldened part the equative structure not so ... as is used or it's another structure with a different meaning.

... they will conclude that a new belief is probably either an advance, or so unlikely to become common as to be innocuous.

  • @EdwinAshworth, should I delete my post if I realize it's a duplicate?
    – apadana
    May 11 '18 at 11:05
  • 1
    Don't worry about it; it should be closed in the course of time. Read the other question and answers; there may be some nuance that is different. I'm not sure how common the term 'equative structure' is in the literature. May 11 '18 at 11:10
  • Thanks, @EdwinAshworth. I've seen the term 'equative' in an advanced grammar book of Oxford. 'equative structure' also seems to be used.
    – apadana
    May 11 '18 at 11:17
  • The statementfrom Enhanced Theme in English ... 'Halliday (1967b) treats the enhanced theme construction as an equative structure.' would seem to indicate that there isn't a consensus on this terminology / analysis. May 11 '18 at 11:22

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