Briefly discuss whether the following statements are correct, detailing at least one case precedent to support your argument for each statement:

1. Acceptance can only be in writing
2. If you take an item from a supermarket shelf in aisle 3 and then change your mind and leave it in aisle 7, the supermarket can make you pay for it as you have accepted the contract.
3. Once an offer has been made it can never be revoked
4. There is a rebuttable presumption against an intention to create legally enforceable agreement when the agreement is domestic in nature.