Consent is considered as a maintenance of reason, which must be linked to reflection. It is possible for a person to behave normally, but he cannot understand the transaction and therefore not be able to make a rational judgment, which leads to the insolidicity of the mind. According to section 12 of the Act, a person is considered a sound mind when he is able to understand at the time of entering into the contract and to render a rational judgment. This implies that a person who is usually of unhealthy mind and partly of healthy mind, then he should enter into a contract if he is of a healthy mind, and if it is the other way around, then the person should avoid making a contract if he is of an unhealthy mind. The insolide spirit leads to the treaty continuing to be invalidated. But the reason is in favor of that person, which implies the ability to understand and make rational decisions about his interests. For example, if one person of the other claims that the person has become unable to understand their affairs due to age, it is up to the person to prove the insolidity of the other`s mind. The solidity of the mind can be for various reasons like madness, drunkenness, mental idiocy and age. A contract entered into by a person who does not have the mental capacity to understand the nature and consequences of the contract is signed from the outset. On the other hand, contracts with lunatics, people under the influence of drugs can / can not be disabled, depending on the circumstances of the situation.
5. Reflection 2 (d): If the promise or any other person has done something or abstained at the request of the promise, or abstains, renounces or promises to do or do nothing, such an act or abstinence or promise is qualified as consideration for the promise. Price paid by one party for the promise of the other technical word that means QUID-PRO-QUO, that is, something in return. The last factor concerns people who have been disqualified by law to enter into a contract. These include different types of human beings. First, they are foreign enemies, that is, in accordance with Article 83 of the Code of Civil Procedure (hereinafter „CPC“), that no one can conclude a contract with a foreigner in the event of war, unless the government allows it. . . .