body: Paul Davies. [*JC Smith's The Law of Contract* (2018 2 ed)](https://www.amazon.co.uk/Smiths-Law-Contract-Paul-Davies/dp/0198807813/ref=dp_ob_title_bk). pp. 75-76.
  
  
  
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  Can the two hypotheticals (orange and red) be distinguished? Why's the red a gratuitous promise but the orange an offer to contract? 
  
  
  I can't? Both stipulate £5K/year and the phrase "so long as you remain unmarried" The orange has "Please do not remarry", but this feels superfluous as "so long as you remain unmarried" is already stipulated. 
  
  
  
title: "so long as you remain unmarried": Why a gratuitous promise in one fact pattern, but a contractual offer in another?