What is the definition of contract? What are the elements of a valid contract? Explain the meaning of each element. What is meant by "meeting of the minds"? What vitiates consent? Explain the meaning of each. What can be objects/subjects of a contract? Give 4 examples of what cannot be the objects of contracts. Give examples of causes that are invalid. What is meant by the cause of the contract must be "within the commerce of men"? What is the rule with respect to what form must contracts have? Give two exceptions to this rule.