Screenshot on the left: O'Sullivan & Hilliard's The Law of Contract (2018 8 ed). p. 328.
Right: Paul Davies. JC Smith's The Law of Contract (2018 2 ed). p. 466.

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To what does the red underline refer? It can't be the green, as the green appears in Davies's definition of estoppel.

  • 1
    You should transcribe the words in the image. – Acccumulation May 2 '19 at 21:44

'The former' means the first part of the green:

the mistake ‘must be one calculated to benefit’ the non-mistaken party or to be detrimental to the mistaken party

Estoppel works to prevent harm to the misled, not to prevent benefit to the misleader.

  • Yes the principle is meant to prevent harm to the misled, but the sentence is focusing on the word "calculated", meaning planned in that case. – Putvi May 2 '19 at 21:11
  • @Putvi promissory estoppel requires knowingly misleading someone - calculation is inherently part of that. – Dale M May 8 '19 at 23:57

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