Test yourself

Choose the correct word in each pair to complete the text.

A promise to perform

We should distinguish between two types of promise, namely those which do and don't give rise to a legal duty . Thus, a promise to meet one's other half for dinner at 7pm gives rise to no legal obligation - it is a "mere" promise - whereas a promise to sell someone a car for £5000 gives rise to legal obligation .

English contract doctrine distinguishes between bilateral and unilateral contracts. A (1 p.) contract gives rise to obligations on both sides. Thus in a contract of sale, the seller has an obligation to transfer title in the thing sold to the buyer, whilst the buyer has an obligation to pay the price. A (1 p.) contract, by contrast, gives rise to obligations on one side only. Thus "I will give you £100 if you run a marathon" gives rise to a legal duty on the (1 p.) to pay the money if the race is run, whilst the person to whom the offer is made (the (1 p.) ) is under no obligation to run in the first place.